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प्रश्न
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
- Complete the path of the ray till it emerges out of the slab.
- In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r?
- Mark angles of emergence by the letter e. How are the angles i and e related?
- Which two rays are parallel to each other? Name them.
- Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
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उत्तर
- The ray's path through the glass slab is complete.
- `""^amu_g = "R.I glass" = sin i/sin r`
- Angle of emergence ∠e is marked ∠i = ∠e
- Emergent ray BD and incident ray AO are parallel.
- DE shows the lateral displacement.
The following factors affect lateral displacement:
- The angle of incidence.
- The glass slab's (or medium's) thickness.
- Refractive index of glass.
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संबंधित प्रश्न
A coin is places at the bottom of a beaker containing water (refractive index = 4/3) to a depth of 12 cm. By what height the coin appears to be raised when seen from vertically above?
In the fig., PO is a ray of light incident on a rectangular glass block.
(a) Complete the path of the ray through the block.
(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles I and r?
(c) Mark angle of emergence by the letter e. How are the angles i and e related?
(d) Which two rays are parallel to each other? Name them.
(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray.
Name the phenomenon responsible in the following case:
Twinkling of stars
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Define the term refractive index of a medium in terms of velocity of light.
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Consider these indices of refraction: glass: 1.52; air: 1.0003; water: 1.333. Based on the refractive indices of three materials, arrange the speed of light through them in decreasing order.
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