Same chapter1 markDifficulty: Easy
The refractive index of a medium in which light travels at 2 × 108 m s−1 is:
Refraction of Light at Plane Surfaces
1 markDifficulty: Easy
The refractive index of a medium is 1.5. The speed of light in that medium is: (speed of light in vacuum = 3 × 108 m s−1)
- a2 × 108 m s−1
- b4.5 × 108 m s−1
- c1.5 × 108 m s−1
- d3 × 108 m s−1
Original Khojo Papers practice question — not from a past board paper.
Answer
2 × 108 m s−1
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Refractive index = speed in vacuum ÷ speed in the medium, so the speed in the medium = 3 × 108 ÷ 1.5 = 2 × 108 m s−1.
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