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प्रश्न
A fish swimming in a pond seems nearer than it really is. Explain.
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उत्तर
This is because a light ray coming from the fish inside the water when suffers refraction at the water-air interface, it bends away from the normal at the point of incidence. The refracted ray appears to be coming from a point at a depth less than the actual depth of the fish. That is why the fish seems to be nearer than it really is.
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संबंधित प्रश्न
Write a short note on dispersion of light.
On the basis of the experiment, "To trace the path of a ray of light through a rectangular glass slab", students of a class arrived at which one of the following conclusions?
(A) Angle of incidence is greater than the angle of emergence.
(B) Angle of emergence is smaller than the angle of refraction.
(C) Emergent ray is parallel to the refracted ray.
(D) Incident ray and emergent ray are parallel to each other.
Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation.
How must light travel out of a substance if it is not going to be refracted?
Observe the figure and write accurate conclusion regarding refraction of light.
-
- the angle of refraction and
- the angle of deviation for the ray?
The refractive index of air with respect to glass is defined: as gµa = sin i/sin r
If r = 90°, what is the corresponding angle i called?
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.
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.
