Q. The frequency of a photon, having energy $100\ eV$ is ($h = 6.6 \times 10^{- 34}J$-$s$)
A) $2.42 \times 10^{26}Hz$
B) $2.42 \times 10^{16}Hz$
C) $2.42 \times 10^{12}Hz$
D) $2.42 \times 10^{9}Hz$
Explanation
(b) $E = hv \Rightarrow 100 \times 1.6 \times 10^{- 19} = 6.6 \times 10^{- 34} \times v$
$\Rightarrow v = 2.42 \times 10^{16}Hz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.