The energy of a photo having a wavelength of 10^-10m is (h= 6.63 x 10^-34Js, c =3.0 x 10^8ms-1)

A. 2 x 10^-15J
B. 1.7 x 10 ^-13J
C. 2.0 x 10 ^-12J
D. 1.7 x 10 ^-12J

Correct Answer:

Option A – 2 x 10^-15J

Explanation

E = hc/λ

E = 2 x 10^-15J