How much energy is in an 89.7 MHz photon of FM-radiation? A)2.2 *10^-³³ J B)9.5 *10^-²⁷ J C)7.4 * 10^-⁴² J D)5.9 *10^-²⁶ J E)3.7 *10^-²⁵ J

Question

Quizplus · Accepted Answer

The energy of a photon can be calculated using the equation E = hf, where h is the Planck's constant (6.626 × 10^-34 J*s) and f is the frequency of the radiation. 
E = hf = (6.626 × 10^-34 J*s) × (89.7 × 10^6 Hz) = 5.93 × 10^-20 J
Rounding to two significant figures, the answer is 5.9 × 10^-20 J, which corresponds to choice D.

How Much Energy Is in an 89