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Which of the following statements) regarding photo -emission of electrons is/are incorrect?
- a)Kinetic energy of electron increases with the intensity of incident light.
- b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.
- c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet light
- d)Photoelectric emission is instantaneous with the incidence of light.
Correct answer is option 'A,B,C'. Can you explain this answer?
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Which of the following statements) regarding photo -emission of electr...
-Kinetic energy of photoelectrons depends on the frequency of incident light but not on its intensity, for photoelectric effect the frequency of incident light should be greater than threshold frequency.
-In the photoelectric effect, electrons are emitted from matter (metals and non-metallic solids, liquids, or gases) as a consequence of their absorption of energy from electromagnetic radiation of high frequency (short wavelength), such as ultraviolet radiation.
-The Photoelectric effect is an instantaneous phenomenon. There is no time delay between the incidence of light and emission of photoelectrons.
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Which of the following statements) regarding photo -emission of electr...
Incorrect Statements Regarding Photoemission of Electrons:
a) Kinetic energy of electron increases with the intensity of incident light.
b) Electrons are emitted when the wavelength of the incidence of light is greater than the threshold frequency.
c) Photoelectrons are emitted whenever a gas is irradiated with ultraviolet light.
d) Photoelectric emission is instantaneous with the incidence of light.
Explanation:
a) Kinetic energy of electron increases with the intensity of incident light:
This statement is incorrect. According to the photoelectric effect, the kinetic energy of emitted electrons depends on the frequency of the incident light, not its intensity. The intensity of light only determines the number of electrons emitted, not their energy. The energy of the emitted electrons is given by the equation:
E = hf - φ
where E is the kinetic energy of the electron, h is Planck's constant, f is the frequency of the incident light, and φ is the work function of the material. As the frequency increases, the kinetic energy of the electrons increases, regardless of the intensity of the light.
b) Electrons are emitted when the wavelength of the incidence of light is greater than the threshold frequency:
This statement is also incorrect. Electrons are emitted when the frequency of the incident light is greater than or equal to the threshold frequency, not the wavelength. The threshold frequency is the minimum frequency required to eject electrons from a material. If the frequency of the incident light is less than the threshold frequency, no electrons will be emitted, regardless of the wavelength.
c) Photoelectrons are emitted whenever a gas is irradiated with ultraviolet light:
This statement is incorrect. Photoelectrons are emitted when a material is irradiated with light of sufficient frequency to overcome the work function of the material. The work function is the minimum amount of energy required to remove an electron from the material. Different materials have different work functions, so the frequency of light required to cause photoemission varies from material to material. It is not limited to ultraviolet light or gases.
d) Photoelectric emission is instantaneous with the incidence of light:
This statement is correct. The photoelectric emission of electrons occurs instantaneously when the incident light reaches the material's surface. There is no time delay between the incidence of light and the emission of electrons. This instantaneous nature of photoemission is one of the key features of the photoelectric effect.
a) Kinetic energy of electron increases with the intensity of incident light.
b) Electrons are emitted when the wavelength of the incidence of light is greater than the threshold frequency.
c) Photoelectrons are emitted whenever a gas is irradiated with ultraviolet light.
d) Photoelectric emission is instantaneous with the incidence of light.
Explanation:
a) Kinetic energy of electron increases with the intensity of incident light:
This statement is incorrect. According to the photoelectric effect, the kinetic energy of emitted electrons depends on the frequency of the incident light, not its intensity. The intensity of light only determines the number of electrons emitted, not their energy. The energy of the emitted electrons is given by the equation:
E = hf - φ
where E is the kinetic energy of the electron, h is Planck's constant, f is the frequency of the incident light, and φ is the work function of the material. As the frequency increases, the kinetic energy of the electrons increases, regardless of the intensity of the light.
b) Electrons are emitted when the wavelength of the incidence of light is greater than the threshold frequency:
This statement is also incorrect. Electrons are emitted when the frequency of the incident light is greater than or equal to the threshold frequency, not the wavelength. The threshold frequency is the minimum frequency required to eject electrons from a material. If the frequency of the incident light is less than the threshold frequency, no electrons will be emitted, regardless of the wavelength.
c) Photoelectrons are emitted whenever a gas is irradiated with ultraviolet light:
This statement is incorrect. Photoelectrons are emitted when a material is irradiated with light of sufficient frequency to overcome the work function of the material. The work function is the minimum amount of energy required to remove an electron from the material. Different materials have different work functions, so the frequency of light required to cause photoemission varies from material to material. It is not limited to ultraviolet light or gases.
d) Photoelectric emission is instantaneous with the incidence of light:
This statement is correct. The photoelectric emission of electrons occurs instantaneously when the incident light reaches the material's surface. There is no time delay between the incidence of light and the emission of electrons. This instantaneous nature of photoemission is one of the key features of the photoelectric effect.
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Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer?
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Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer?.
Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements) regarding photo -emission of electrons is/are incorrect?a)Kinetic energy of electron increases with the intensity of incident light.b)Electrons are emitted when the frequency of the incidence of light is greater than to threshold frequency.c)Photoelectrons are emitted whenever a gas is irradiated with ultraviolet lightd)Photoelectric emission is instantaneous with the incidence of light.Correct answer is option 'A,B,C'. Can you explain this answer?.
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