The Longest Wavelength of Light That Causes Electrons to Be

question 30

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

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