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The Longest Wavelength of Light That Causes Electrons to Be

Question 28

Multiple Choice

The longest wavelength of light that causes electrons to be ejected from the surface of a copper plate is 243 nm. What is the maximum velocity of the electrons ejected when light of wavelength 200.nm shines on a copper plate?


A) 1.48 * 106 m/s
B) 6.22 * 105 m/s
C) 4.67 * 104 m/s
D) 1.97 * 104 m/s
E) 1.34 * 106 m/s

Correct Answer:

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