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प्रश्न
When light travels from a denser to a rarer medium, its speed ______.
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उत्तर
When light travels from a denser to a rarer medium, its speed increases.
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संबंधित प्रश्न
Write true or false of the following statement.
The speed of light in vacuum is 3 × 108 ms-1.
State whether light slows down or speeds up in the following cases :
Light going from air to glass.
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)
Materials that allow light to pass through completely are known as ______ material.
Materials that are not able to allow light to pass through, are called ______ material.
Define transparent materials.
Define opaque material.
Higher-Order Thinking Skills:
M = 2.42 for diamond. What is the meaning of this statement in relation to the speed of light?
