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प्रश्न
Can the absolute refractive index of a medium be less than one?
Can the value of the absolute refractive index be lesser than 1?
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उत्तर
No, the absolute refractive index of a medium cannot be less than one because the speed of light in any medium is always less than that in a vacuum.
संबंधित प्रश्न
After tracing the path of a ray of light passing through a rectangular glass slab for four different values of the angle of incidence, a student reported his observations in tabular form as given below:
| S.No | ∠ i | ∠ r | ∠ e |
| I | 30° | 19° | 29° |
| II | 40° | 28° | 40° |
| III | 50° | 36° | 50° |
| IV | 60° | 40° | 59° |
The best observation is
(A) I
(B) II
(C) III
(D) IV
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- the wavelength of light in glass.
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In the fig. name the ray which represents the correct path of light while passing through a glass block.
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Why do the faces of persons sitting around campfire appear to shimmer?
What do you understand by the deviation produced by a prism?
In the diagram below, PQ is a ray of light incident on a rectangular glass block.
Copy the diagram and complete the path of the ray of light through the glass block. In your diagram, mark the angle of incidence by letter ‘i’ and the angle of emergence by the letter ‘e’.
In the diagram alongside a ray of light, PQ is incident normally on one face AB of an equilateral glass prism. What is the angle of incidence at the faces AB and AC?
Trace a ray of light incident at 30° on a surface if travelling from glass to air. What is the angle of refraction in this case? (R.I. for glass = 3/2).
A coin placed at the bottom of a beaker appears to be raised by 4.0 cm. If the refractive index of water is 4/3, find the depth of the water in the beaker.
What is lateral displacement?
