NEETPhysics-Electromagnetic Waves
NEET Physics Wave Propagation MCQ Question
Type: MCQ-numerical-Hard-Class 12
The electric field of an electromagnetic wave travelling through a medium is given by E(x,t) = 25sin(2.0×10⁻¹⁵t−10⁷x)k̂ then the refractive index of the medium is (All given measurement are in SI units)
A
5
B
2
C
7
D
2
Correct Answer
Option A
Detailed Explanation
The wave number k and angular frequency ω are related by the speed of light in the medium. The refractive index is calculated using n = c/v.
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