Q. The energy of a photon of green light of wavelength 50000 $\mathring{\mathrm{A}}$ is
A) $3.459 \times 10^{- 19}\ J$
B) $3.973 \times 10^{- 19}\ J$
C) $4.132 \times 10^{- 19}\ J$
D) $8453 \times 10^{- 19}\ J$
Explanation
(b) $E = hc/\lambda\ = 6.6 \times 10^{- 34} \times 3 \times 10^{8}/5000 \times 10^{- 19}$
$= 3.973 \times 10^{- 19}$ J
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.