NEETPhysics-Electromagnetic Waves
NEET Physics Laser MCQ Question
Type: MCQ-numerical-Hard-Class 12
A laser beam has intensity of 4.0 × 10¹⁴ W/m². The amplitude of magnetic field associated with beam is _______. (Take ε₀ = 8.85 × 10⁻¹²C²/Nm² and c = 3 × 10⁸ m/s)
A
0
B
18.3
C
5.5
D
83
Correct Answer
Option C
Detailed Explanation
The amplitude of the magnetic field can be calculated using the relation between intensity, electric field, and magnetic field.
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