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प्रश्न
A ray of monochromatic light is incident from air into a glass slab. Draw a labelled ray diagram indicating the change in its path 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?
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उत्तर
The labelled ray diagram is shown in the figure.
Refractive index of glass = `Sin "i"/Sin "r"`
संबंधित प्रश्न
Define refraction and state the laws of refraction.
If the speed of light in vacuum is 3 × 108 ms−1, find the speed of light in a medium of absolute refractive index 1.5.
A ray of light passes from glass into air. The angle of refraction will be:
(a) equal to the angle of incidence
(b) greater than the angle of incidence
(c) smaller than the angle of incidence
(d) 45°
How does the angle of deviation produced by a prism change with increase in the angle of incidence. Draw a curve showing the variation in the angle of deviation with the angle of incidence at a prism surface.
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(a) speeds up
(b) slows down. In each case, give one example of the medium.
How does the deviation produced by a prism depend on the wavelength of incident light?
A ray of light passes from water to air. How does the speed of light change?
Why is the colour red used as a sign of danger?
Why does the sun appear bigger during sunset or sunrise?
