Advertisements
Advertisements
प्रश्न
A light ray passes from water to
- air, and
- glass.
In each case, state how does the speed of light change.
Advertisements
उत्तर
- When a light beam travels from water to air. There will be an increase in light speed.
- A light beam travels slower through glass than it does through water.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative
The speed of light is maximum in
State the speed of light in (a) air, (b) glass.
State whether light slows down or speeds up in the following cases :
Light going from air to glass.
State whether light slows down or speeds up in the following cases :
Light going from water to air.
When light travels from a denser to a rarer medium, its speed ______.
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?
Numerical problem.
Light enters from air into a glass plate having refractive index 1.5. What is the speed of light in glass? (Ans: 2 × 108 ms–1)
Objects that allow light to pass through partially are called ______ material.
The speed of light decreases in a denser medium, light bends towards the normal.
Higher-Order Thinking Skills:
M = 2.42 for diamond. What is the meaning of this statement in relation to the speed of light?
