Question

The frequency of a photon, having energy 100 eV is $(h={6.610}^{-34}J-sec)$

• A. $2.42\times {10}^{26}Hz$
• B. $2.42\times {10}^{16}Hz$
• C. $2.42\times {10}^{12}Hz$
• D. $2.42\times {10}^{9}Hz$

Answer 1

The correct option is B

$2.42\times {10}^{16}Hz$

$E=hv\Rightarrow 100\times 1.6\times {10}^{-19}=6.6\times {10}^{-34}\times V$
$\Rightarrow v=2.42\times {10}^{16}Hz$