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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
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 glass to water.
A light ray passes from water to
- air, and
- glass.
In each case, state how does the speed of light change.
A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it.
Compare the speeds of light of wavelength 4000 Å (i.e. violet light) and 8000 Å (i.e. red light) in vacuum.
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)
Higher Order Thinking Skill.
What do you conclude about the speed of light in diamond. if the refractive index of diamond is 2.41?
Define transparent materials. Give example.
Two medium with a refractive index of 1.31 & 1.50 is given. In which case
- The bending of light is more and
- speed of light is more.
Higher-Order Thinking Skills:
M = 2.42 for diamond. What is the meaning of this statement in relation to the speed of light?
