Advertisements
Advertisements
Question
The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5.
Advertisements
Solution
Given,
Speed of light in air, c = 3 × 108 m/s-1
Refractive index of glass, 𝛍 = 1.5
Speed of light in glass, v = ?
We know that,
∴ `c/v=µ `
∴ `v=(3xx10^8"m/s")/1.5`
`v=2xx10^8"m/s"`
APPEARS IN
RELATED QUESTIONS
Select the correct alternative
The speed of light is maximum in
State the speed of light in (a) air, (b) glass.
A light ray passes from water to
- air, and
- glass.
In each case, state how does the speed of light change.
An obliquely incident light ray bends at the surface due to a change in speed when passing from one medium to another. The ray does not bend when it is incident normally. Will the ray have a different speed in the other medium?
Higher Order Thinking Skills.
Light ray emerges from water into air. Draw a ray diagram indicating the change in its path in water.
Higher Order Thinking Skill.
What do you conclude about the speed of light in diamond. if the refractive index of diamond is 2.41?
Light travels ______ kilometers per second in air or vacuum. In theory, nothing can travel faster than light.
Define opaque material.
The speed of light decreases in a denser medium, light bends towards the normal.
Light is one of the slowest traveling energy with a speed of 3 × 10-8ms-1
