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The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.
- a)a minimum wavelength of (approx.) 2.0 A° associated with it
- b)a stopping potential of (approx) 38.5 V
- c)photoelectrons that cannot be emitted
- d)photoelectron that will be emitted in 10-10 seconds time
Correct answer is option 'A,B,D'. Can you explain this answer?
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The photon emitted in n = 3 to n = 1 transition in He+ hits a photose...
For He+, transition is from n = 3 to n = 1,
Energy emitted = E2 - E1= 4 (13.6 - 3.4)= 40.8 eV
Work function 
. The maximum K.E. of electron = 40.8 - 2.3 = 38.5 eV
. The maximum K.E. of electron = 40.8 - 2.3 = 38.5 eVStopping potential = 38.5 V
According to the de-Broglie concept of matter waves, the wavelength associated with electron will be,
The time interval between the incidence of photon and the ejection of the photoelectron is approximately 10-10 seconds, which is an instantaneous process.
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The photon emitted in n = 3 to n = 1 transition in He+ hits a photose...
Explanation:
When an electron in an atom makes a transition from a higher energy level to a lower energy level, it releases a photon with a specific wavelength. In this case, the photon emitted in the n=3 to n=1 transition in He has a wavelength of 328 nm (or 3280 A°).
Photoelectric Effect:
When a photon hits a photosensitive surface, it can eject an electron from the surface. This is known as the photoelectric effect. The energy of the photon must be greater than the work function of the surface (i.e. the minimum energy required to eject an electron) in order for the electron to be ejected.
Threshold wavelength:
For a given surface, there is a minimum wavelength (known as the threshold wavelength) of photons that can eject an electron from the surface. Any photons with a wavelength greater than the threshold wavelength will not be able to eject an electron.
In this case, the threshold wavelength of the photosensitive surface is 6000 A°. Any photons with a wavelength greater than 6000 A° will not be able to eject an electron from the surface.
Photoelectrons:
When an electron is ejected from a photosensitive surface, it is known as a photoelectron. The energy of the photoelectron is equal to the energy of the photon minus the work function of the surface.
Minimum wavelength of photoelectrons:
If the photon has enough energy to eject an electron, the photoelectron will have a minimum wavelength associated with it. This minimum wavelength is given by the de Broglie wavelength of the electron, which is given by λ = h/p, where h is Planck's constant and p is the momentum of the electron.
Stopping potential:
If a voltage is applied to the photosensitive surface, it can be used to stop the photoelectrons from reaching a detector. The minimum voltage required to stop the photoelectrons is known as the stopping potential.
Answer:
Therefore, the photoelectrons emitted in this case will have:
- a minimum wavelength of (approx.) 2.0 A° associated with it (as calculated from the de Broglie wavelength of the electron)
- a stopping potential of (approx) 38.5 V (which can be calculated from the energy of the photon and the work function of the surface)
- photoelectrons that will be emitted in 10-10 seconds time (as this is a characteristic time scale for the photoelectric effect)
When an electron in an atom makes a transition from a higher energy level to a lower energy level, it releases a photon with a specific wavelength. In this case, the photon emitted in the n=3 to n=1 transition in He has a wavelength of 328 nm (or 3280 A°).
Photoelectric Effect:
When a photon hits a photosensitive surface, it can eject an electron from the surface. This is known as the photoelectric effect. The energy of the photon must be greater than the work function of the surface (i.e. the minimum energy required to eject an electron) in order for the electron to be ejected.
Threshold wavelength:
For a given surface, there is a minimum wavelength (known as the threshold wavelength) of photons that can eject an electron from the surface. Any photons with a wavelength greater than the threshold wavelength will not be able to eject an electron.
In this case, the threshold wavelength of the photosensitive surface is 6000 A°. Any photons with a wavelength greater than 6000 A° will not be able to eject an electron from the surface.
Photoelectrons:
When an electron is ejected from a photosensitive surface, it is known as a photoelectron. The energy of the photoelectron is equal to the energy of the photon minus the work function of the surface.
Minimum wavelength of photoelectrons:
If the photon has enough energy to eject an electron, the photoelectron will have a minimum wavelength associated with it. This minimum wavelength is given by the de Broglie wavelength of the electron, which is given by λ = h/p, where h is Planck's constant and p is the momentum of the electron.
Stopping potential:
If a voltage is applied to the photosensitive surface, it can be used to stop the photoelectrons from reaching a detector. The minimum voltage required to stop the photoelectrons is known as the stopping potential.
Answer:
Therefore, the photoelectrons emitted in this case will have:
- a minimum wavelength of (approx.) 2.0 A° associated with it (as calculated from the de Broglie wavelength of the electron)
- a stopping potential of (approx) 38.5 V (which can be calculated from the energy of the photon and the work function of the surface)
- photoelectrons that will be emitted in 10-10 seconds time (as this is a characteristic time scale for the photoelectric effect)
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The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer?
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The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer?.
The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The photon emitted in n = 3 to n = 1 transition in He+ hits a photosensitive surface of threshold wavelength 6000 A°. The photoelectrons emitted will have __________.a)a minimum wavelength of (approx.) 2.0 A° associated with itb)a stopping potential of (approx) 38.5 Vc)photoelectrons that cannot be emittedd)photoelectron that will be emitted in 10-10 seconds timeCorrect answer is option 'A,B,D'. Can you explain this answer?.
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