An Ultraviolet Light Beam Having a Wavelength of 217 Nm

Multiple Choice

An ultraviolet light beam having a wavelength of 217 nm is incident on a molybdenum surface with work function of 4.9 eV.What is the stopping potential? (h = 6.63 × 10−³⁴ J⋅s,c = 3.00 × 10⁸ m/s,1 eV = 1.6 × 10−¹⁹ J,and 1 nm = 10−⁹ m)

A) 10.6 V
B) 5.3 V
C) 0.8 V
D) 0.4 V
E) ​5.7 V