The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 × 108 m s−1)
Refractive index of glass, μ = 1.5
Speed of light, c = 3 × 108 m/s
Speed of light in glass is given by the relation
`"v" = "c"/μ`
= `(3 xx 10^8)/1.5`
= 2 × 108 m/s
Hence, the speed of light in glass is 2 × 108 m/s.
Given:
Refractive index of glass = 1.5
Speed of light in air = 3.0 × 108 m/s
Speed of light in glass = ?
Applying the formula for refractive index, we get:
Refractive index of a medium = (Speed of light in air)/(Speed of light in medium)
For glass:
Refractive index of glass = (Speed of light in air)/(Speed of light in glass)
(Speed of light in glass) = (Speed of light in air)/(Refractive index of glass)
= (3.0 × 108)/1.5
= 2.0 × 108 m/s
Concept: Reflection and Refraction of Plane Wave at Plane Surface Using Huygens' Principle - Refraction of a Plane Wave
Is there an error in this question or solution?
The speed of light in air is 3 × 10 8 m s 1. Calculate the speed of light in glass. The refractive index of glass is 1.5.
Open in App
Suggest Corrections
6