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प्रश्न
State the speed of light in (a) air, (b) glass.
उत्तर
(a) Air — 3 × 108
(b) Glass — 2 × 108
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संबंधित प्रश्न
Select the correct alternative
The speed of light is maximum in
State whether light slows down or speeds up in the following cases :
Light going from air to 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 Skill.
What do you conclude about the speed of light in diamond. if the refractive index of diamond is 2.41?
Materials that allow light to pass through completely are known as ______ material.
Objects that allow light to pass through partially are called ______ material.
Materials that allow light to pass through completely are known as transparent materials.
Define transparent materials. Give example.
The speed of light decreases in a denser medium, light bends towards the normal.
