Q. The minimum wavelength of photon is $5000\ \mathring{\mathrm{A}},$ its energy will be
A) $2.5\ eV$
B) $50\ V$
C) $5.48\ eV$
D) $7.48\ eV$
Explanation
(a) $E = \frac{12375}{\lambda} = \frac{12375}{5000} = 2.47\ eV = 2.5\ eV$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.