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According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.
If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.
Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimum
- a)wavelength
- b)frequency
- c)amplitude
- d)angle of incidence
Correct answer is option 'B'. Can you explain this answer?
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According to wave theory of light, the light of any frequency can emi...
Photoelectric Effect and the Minimum Frequency
The photoelectric effect refers to the emission of electrons from a metal surface when light is incident upon it. This phenomenon was studied extensively by Albert Einstein, who proposed that electromagnetic radiation is quantized into discrete packets of energy known as photons. The wave theory of light, on the other hand, predicts that the energy of a light wave is proportional to its intensity and frequency.
Experimental Observations
According to the wave theory of light, any frequency of light should be able to emit electrons from a metallic surface if the intensity of the light is sufficient to provide the necessary energy for emission. However, experimental observations showed a different result. It was found that light of frequency less than a certain threshold frequency could not eject electrons from the surface, regardless of the intensity of the incident light.
Minimum Frequency and Einstein's Explanation
Einstein explained this observation by proposing that the energy of a photon is directly proportional to its frequency. In the photoelectric effect, the energy required to remove an electron from the metal surface is called the work function. Einstein suggested that for electrons to be ejected, the energy of a single photon must be greater than or equal to the work function of the metal.
Relation to Wavelength and Frequency
The wavelength and frequency of light are inversely proportional to each other according to the wave theory. Therefore, if the frequency of light is below the threshold frequency, its wavelength will be longer than the wavelength of light above the threshold frequency.
Stopping Potential and Wavelength of Incident Light
In the given scenario, photoelectrons are ejected from the surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for these electrons is given as Vs = 0.19. This means that the kinetic energy of the ejected electrons is equal to the energy gained from the electric field, which can be calculated using the stopping potential.
Effect of Incident Light of Wavelength λ2 = 190 nm
If the radiation of wavelength λ2 = 190 nm is incident on the surface, we can determine whether electrons will be ejected or not. Since the wavelength of light is shorter than the threshold wavelength (λ1), the frequency of the incident light will be higher. According to Einstein's explanation, the energy of photons with higher frequency is greater. Therefore, the energy of the photons in this case will be sufficient to eject electrons from the surface.
Conclusion
In conclusion, according to the photoelectric effect, electrons are ejected from metals when the incident light has a certain minimum frequency. This is because the energy of a photon is directly proportional to its frequency, and for electrons to be ejected, the energy of a single photon must be greater than or equal to the work function of the metal. The minimum frequency required for electron ejection is related to the threshold frequency, which determines the wavelength of light that can emit electrons from a metallic surface.
The photoelectric effect refers to the emission of electrons from a metal surface when light is incident upon it. This phenomenon was studied extensively by Albert Einstein, who proposed that electromagnetic radiation is quantized into discrete packets of energy known as photons. The wave theory of light, on the other hand, predicts that the energy of a light wave is proportional to its intensity and frequency.
Experimental Observations
According to the wave theory of light, any frequency of light should be able to emit electrons from a metallic surface if the intensity of the light is sufficient to provide the necessary energy for emission. However, experimental observations showed a different result. It was found that light of frequency less than a certain threshold frequency could not eject electrons from the surface, regardless of the intensity of the incident light.
Minimum Frequency and Einstein's Explanation
Einstein explained this observation by proposing that the energy of a photon is directly proportional to its frequency. In the photoelectric effect, the energy required to remove an electron from the metal surface is called the work function. Einstein suggested that for electrons to be ejected, the energy of a single photon must be greater than or equal to the work function of the metal.
Relation to Wavelength and Frequency
The wavelength and frequency of light are inversely proportional to each other according to the wave theory. Therefore, if the frequency of light is below the threshold frequency, its wavelength will be longer than the wavelength of light above the threshold frequency.
Stopping Potential and Wavelength of Incident Light
In the given scenario, photoelectrons are ejected from the surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for these electrons is given as Vs = 0.19. This means that the kinetic energy of the ejected electrons is equal to the energy gained from the electric field, which can be calculated using the stopping potential.
Effect of Incident Light of Wavelength λ2 = 190 nm
If the radiation of wavelength λ2 = 190 nm is incident on the surface, we can determine whether electrons will be ejected or not. Since the wavelength of light is shorter than the threshold wavelength (λ1), the frequency of the incident light will be higher. According to Einstein's explanation, the energy of photons with higher frequency is greater. Therefore, the energy of the photons in this case will be sufficient to eject electrons from the surface.
Conclusion
In conclusion, according to the photoelectric effect, electrons are ejected from metals when the incident light has a certain minimum frequency. This is because the energy of a photon is directly proportional to its frequency, and for electrons to be ejected, the energy of a single photon must be greater than or equal to the work function of the metal. The minimum frequency required for electron ejection is related to the threshold frequency, which determines the wavelength of light that can emit electrons from a metallic surface.
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According to wave theory of light, the light of any frequency can emi...
For electron emission to take place, the incident light must have a minimum energy corresponding to threshold frequency to overcome the work function.
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According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer?
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According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer?.
According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer?.
Solutions for According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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Here you can find the meaning of According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons, but according to experimental observations, the light of frequency less than threshold frequency can not emit electrons; whatever be the intensity of incident light. Einstein also proposed that electromagnetic radiation is quantised.If photoelectrons are ejected from a surface when light of wavelength λ1 = 550 nm is incident on it. The stopping potential for such electrons is Vs =0.19 . Suppose the radiation of wavelength λ2 = 190 nm is incident on the surface.Q. In photoelectric effect, electrons are ejected from metals, if the incident light has a certain minimuma)wavelengthb)frequencyc)amplituded)angle of incidenceCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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