Question

The ratio of the energies of two different radiations whose frequencies are $3\times {10}^{14}$ Hz and $5\times {10}^{14}$ Hz is ________.

• A. 5 : 3
• B. 3 : 5
• C. 9 : 25
• D. 25 : 9

Answer 1

The correct option is B 3 : 5

Energy of radiation, $E=h\nu$

Therefore ratio of energies $=\frac{E_1}{E_2}=\frac{{\nu }_1}{{\nu }_2}$ $=\frac{3\times {10}^{14}}{5\times {10}^{14}}=3:5$