AIPMT PRELIMS2007Physics-Optics
AIPMT PRELIMS 2007 Physics Refractive Index MCQ Question
Type: MCQ-numerical-Medium-Class 12
The frequency of a light wave in a material is 2 × 10¹⁴ Hz and wavelength is 5000 Å. The refractive index of material will be
A
1.50
B
3.00
C
1.33
D
1.40
Correct Answer
Option A
Detailed Explanation
The speed of light in the material is v = fλ = 2 × 10¹⁴ Hz × 5000 × 10⁻¹⁰ m = 10⁸ m/s. The refractive index n = c/v = 3 × 10⁸ m/s / 10⁸ m/s = 3.0.
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