The Longest Wavelength of Light That Causes Electrons to Be

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