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A Pair of Silver Plates in a Vacuum Are Separated

Question 22

Multiple Choice

A pair of silver plates in a vacuum are separated by 1 cm and have a potential difference of 2.0 kV between them.What is the largest wavelength of light that can be shined on the cathode to produce a current through the anode?


A) 1.2 * 10-11 m
B) 8.0 * 10-11 m
C) 9.8 * 10-11 m
D) 6.2 * 10-10 m
E) 1.2 * 10-9 m

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