Start learning →

Using n=c/v, c=3×10^8 m/s and v=2×10^8 m/s, find n.

A3.0
B2/3
C2.0
D1.5
Answer & Solution
Correct answer: D. 1.5
The speed ratio c/v is 3/2, giving a refractive index of 1.5.
Practise this question with Quill — ICSE Class 10 →

Keep practising Ray Optics and Optical Instruments

Browse all Ray Optics and Optical Instruments questions for ICSE Class 10, or explore more Physics topics.

Start a Ray Optics and Optical Instruments lesson →