The frequency of light wave in a material is 2 × 10¹⁴ Hz and wavelength is 5000 Å. The refractive index of the material is:
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The frequency of light wave in a material is 2 × 10¹⁴ Hz and wavelength is 5000 Å. The refractive index of the material is:

G1 Physics · Accepted Answer

Step 1: Convert wavelength: λ = 5000 Å = 5 × 10⁻⁷ m. Step 2: Phase speed in material v = fλ = (2 × 10¹⁴)(5 × 10⁻⁷) = 1 × 10⁸ m s⁻¹. Step 3: μ = c/v = (3 × 10⁸)/(1 × 10⁸) = 3. Final answer: (B) 3.00.