College Physics:
College Physics:
11th Edition
ISBN: 9781305965515
Author: SERWAY, Raymond A.
Publisher: Brooks/Cole Pub Co
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Chapter 27, Problem 14P

(a)

To determine

The work function of the metal.

(b)

To determine

The observed stopping potential when using the yellow light from a helium discharge tube.

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Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (λ = 546.1 nm) is used, a stopping potential of 0.874 V reduces the photocurrent to zero. (a) Based on this measurement, what is the work function for this metal? eV (b) What stopping potential would be observed when using light from a red lamp (2 = 652.0 nm)? V
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (1 = 546.1 nm) is used, a stopping potential of 0.818 V reduces the photocurrent to zero. (a) Based on this measurement, what is the work function for this metal? eV (b) What stopping potential would be observed when using light from a red lamp (1 = 637.0 nm)? V
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (? = 546.1 nm) is used, a stopping potential of 0.726 V reduces the photocurrent to zero. (a) Based on this measurement, what is the work function for this metal? eV(b) What stopping potential would be observed when using light from a red lamp (? = 639.0 nm)? V
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