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प्रश्न
What is meant by the refraction of light?
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उत्तर
It is a phenomenon in which a ray of light deviates from its original path while travelling from one optical medium to another optical medium.
संबंधित प्रश्न
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
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?
A postage stamp kept below a rectangular glass block of refractive index 1.5 when viewed from vertically above it, appears to be raised by 7.0 mm. Calculate the thickness of the glass slab.
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
A ray of light OP passes through a right angles prism as shown in the adjacent diagram.
(a) State the angles of incidence at the faces AC and BC.
(b) Name the phenomenon which the ray suffers at the face AC.
-
- the angle of refraction and
- the angle of deviation for the ray?
Which colour of light travels fastest in any medium except air?
Why upper surface of water contained in a beaker and above eye level appears silvery?
Explain briefly what causes the twinkling of stars at night.
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.
