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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.
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
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If a ray of light strikes a glass slab at an angle of 600 with the surface of the slab, the angle of incidence must be __________________.
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(a) Does the light speed up or slow down in the glass,
(b) Give the reason for your answer.
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).
The refractive index of glass with respect to air is 1.5. What is the value of the refractive index of air with respect to glass?
The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in the figure. Which one of them is correct?
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 |
 |
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| A | B | C | D |
A ray of light strikes the surface of a rectangular glass slab such that the angle of incidence in air is
- 0°,
- 45°.
In each case, draw a diagram to show the path taken by the ray as it passes through the glass slab and emerges from it.
