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प्रश्न
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.
उत्तर
(a) Diagram showing complete path of light :
(b) Angle of incidence and angle of refraction marked in the above diagram.
R.I = `"sin i"/"sin r"`
(c) Angle of emergence is marked in the above diagram.
Angle of incidence = Angle of emergence
(d) Rays IO and O'E are parallel to each other. These are incident and emergent rays respectively.
(e) In the diagram above, the lateral displacement is indicated by XY.
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संबंधित प्रश्न
When light travels from a rarer to a denser medium, its speed ______.
When a ray of light from air enters a denser medium, it ______.
Fill in the blanks to complete the following sentence
The refractive index of glass with respect to air is 3/2. The refractive index of air with respect to glass will be ……………….
A student has traced the path of a ray of light through a glass slab as follows. If you are asked to label 1, 2, 3 and 4, the correct sequencing of labeling ∠i, ∠e, ∠r and lateral displacement respectively is
(a) 2, 1, 3, 4
(b) 1, 2, 3, 4
(c) 1, 3, 2, 4
(d) 1, 3, 4, 2
In the fig. name the ray which represents the correct path of light while passing through a glass block.
Which of the following has the highest refractive index:
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
(a) Does the light speed up or slow down in the glass,
(b) Give the reason for your answer.
Write the approximate values of speed of light in (i) air and (ii) glass. Use these values to calculate the refractive index of glass with respect to air.
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.
