Question

Find out the frequency of a photon which has $6.6\times {10}^{-18}J$ of energy. Planck's constant, $h$, is $6.6\times {10}^{-34}Js$.

• A. $1.0\times {10}^{-52}Hz$
• B. $1.0\times {10}^{-16}Hz$
• C. $1.0Hz$
• D. $1.0\times {10}^{16}Hz$
• E. $1.0\times {10}^{52}Hz$

Answer 1

The correct option is D $1.0\times {10}^{16}Hz$

Given : $h=6.6\times {10}^{-34}$ $Js$

Energy of photon $E=h\nu$

$\therefore$ $6.6\times {10}^{-18}=6.6\times {10}^{-34}\times \nu$ $⟹\nu =1.0\times {10}^{16}$ $Hz$