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प्रश्न
The diagram (figure) given below shows two parallel rays 1 and 2 incident on (a) a concave mirror, (b) a convex mirror. Draw the reflected rays and mark the focus by the symbol F.

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उत्तर

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संबंधित प्रश्न
What is refraction of light?
The image of an object formed by a plane mirror is:
(a) virtual
(b) real
(c) diminished
(d) upside-down
State two effects caused by the refraction of light.
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A ray of light when passes from glass to air, bends towards the normal.
A ray of light A incident from air suffers partial reflection and refraction at the boundary of water.

- Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
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Observe the given figure and name the following.

| Ray AB | |
| Ray NM | |
| Ray MD | |
| ∠ r |
What is refractive index?
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How do twinkling stars occur? (or) what is the cause of the twinkling of stars?
