The figure shows an apparatus for observing the photoelectric effect. In this apparatus, a light source illuminates a metallic emitter plate (E). Photoelectrons are emitted and accelerate toward the collector ring (C). The presence of emitted electrons can be detected by measuring the currer flowing in the circuit. Suppose the light source is of a single wavelength (A = 140 nm). Suppose also that the binding energy of electrons in the metal emitter () = 3.8 eV. What is the maximum kinetic energy of emitted electrons? Kmax For this metal emitter, what is the maximum wavelength for which electrons will be emitted? A₂ = What will happen if the intensity of the light is decreased (keeping the same wavelength)? 00000 nm eV O The electron current will decrease but not go to zero (and Kmax will be unchanged) O The electron current will decrease and Kmax will also decrease the maximum kinetic energy of individual electrons will decrease (no other changes) The electron current may go to zero The electron current will increase (no other changes) light Evacuated glass tube C E = V V A

The figure shows an apparatus for observing the photoelectric effect. In this apparatus, a light source illuminates a metallic emitter plate (E). Photoelectrons are emitted and accelerate toward the collector ring (C). The presence of emitted electrons can be detected by measuring the currer flowing in the circuit. Suppose the light source is of a single wavelength (A = 140 nm). Suppose also that the binding energy of electrons in the metal emitter () = 3.8 eV. What is the maximum kinetic energy of emitted electrons? Kmax For this metal emitter, what is the maximum wavelength for which electrons will be emitted? A₂ = What will happen if the intensity of the light is decreased (keeping the same wavelength)? 00000 nm eV O The electron current will decrease but not go to zero (and Kmax will be unchanged) O The electron current will decrease and Kmax will also decrease the maximum kinetic energy of individual electrons will decrease (no other changes) The electron current may go to zero The electron current will increase (no other changes) light Evacuated glass tube C E = V V A

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

100%

The figure shows an apparatus for observing the photoelectric effect. In this apparatus, a light
source illuminates a metallic emitter plate (E). Photoelectrons are emitted and accelerate toward
the collector ring (C). The presence of emitted electrons can be detected by measuring the current
flowing in the circuit.
Suppose the light source is of a single wavelength (A = 140 nm). Suppose also that the binding
energy of electrons in the metal emitter () = 3.8 eV. What is the maximum kinetic energy of
emitted electrons?
Kmax =
For this metal emitter, what is the maximum wavelength for which electrons will be emitted?
1₂ =
What will happen if the intensity of the light is decreased (keeping the same wavelength)?
00000
nm
ev
O The electron current will decrease but not go to zero (and Kmax will be unchanged)
The electron current will decrease and Kmax will also decrease
the maximum kinetic energy of individual electrons will decrease (no other changes)
The electron current may go to zero
O The electron current will increase (no other changes)
wwwwwwwwwwww
light
Evacuated glass tube
E
=
V
A

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