The energy associated with the photon of a radio transmission at 3 x 10^5 Hz is [h = 6.63 x 10^-34Js]

A. 2.00 x 10^-28J
B. 1.30 x 10^-28J
C. 2.00 x 10^-29J
D. 1.30 x 10^-28J

Correct Answer: Option A

Explanation

A photon of energy E = hf
= 6.63 x 10^-34 x 3 x 10⁵
= 19.89 x 10^-29
= 2.0 x 10^-28J