Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Easy-Class 12
A laser emits monochromatic light with a frequency of 6.0 × 10^14 Hz and a power of 2.0 × 10^-3 W. What is the energy of a single photon in this light beam?
A
98 × 10^-19 J
B
00 × 10^-19 J
C
6.63 × 10^-34 J
D
99 × 10^-19 J
Correct Answer
Option A
Detailed Explanation
The energy of a photon is given by E = h × ν, where h is Planck's constant (6.63 × 10^-34 J s) and ν is the frequency (6.0 × 10^14 Hz). Therefore, E = 3.98 × 10^-19 J.
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