Question

A wave has a frequency of $3\times {10}^{15}Se{c}^{-1}$.The energy of that photon is

• A. 1.6 x 10^-12 erg
• B. 3.2 x 10^-11 erg
• C. 2.0 x 10^-11 erg
• D. 3 x 10^-15 erg

Answer 1

The correct option is C

2.0 x 10^-11 erg

$E=hv$

= $6.625\times {10}^{-27}\times 3\times {10}^{15}$

= $2\times {10}^{-11}erg$