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प्रश्न
What is the refractive index of vacuum
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उत्तर
Unity
संबंधित प्रश्न
A monochromatic ray of light passes from air to glass. The wavelength of light in air is λ, the speed of light in air is c and in glass is V. If the absolute refractive index of glass is 1.5, write down
- the relationship between c and V,
- the wavelength of light in glass.
For which colour of white light, is the refractive index of a transparent medium the most?
When light travels from a rarer to a denser medium, its speed ______.
A ray of light of wavelength 6600 Å suffer refraction from air to glass. Taking \[\ce{_a\mu_g = \frac{3}{2}}\], find the wavelength of light in glass.
Four students A, B, C and D traced the paths of incident ray and the emergent ray by fixing pins P and Q for incident ray and pins R and S for emergent ray for a ray of light passing through a glass slab.
The correct emergent ray was traced by the student:
(1) A
(2) B
(3) C
(4) D
Fig shows a lens as a combination of a glass block and two prisms.
- Name the lens formed by the combination.
- What is the line XX' called?
- Complete the path of the incident ray PQ after passing through the lens.
- The final emergent ray either meets XX' at a point or appears to come from a point on XX'. Label it as F, What is this point called?
Which colour of light travels fastest in any medium except air?
Define the term refractive index of a medium in terms of velocity of light.
What do you understand by the deviation produced by a prism?
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
What is the angular, deviation of the emergent ray from the glass block with respect to the incident ray?
