An electron makes a transition from a certain energy level Ek to the ground state E0. If the frequency of emission is 8.0 x 10^14Hz. The energy emitted is?

A. 8.25 x 10^-19J
B. 5.28 x 10^-19J
C. 5.28 x 10¹⁹J
D. 8.25 x 10¹⁹J

Correct Answer:

Option B – 5.28 x 10^-19J

Explanation

Atomic emission and absorption of energy is usually in packets referred to as photon or quantum of energy of magnitude E =hf, where f is the frequency and h is the Planck constant

Energy emitted = hf

= 6.6 x 10^-34 x 8.0 x 10^-14
= 5.28 x 10^-19J