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प्रश्न
A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in the following figure. The pencil of light coming out of the hole falls on a mirror.
At which point should the eye be placed, so that the hole can be seen?
पर्याय
A
B
C
D
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उत्तर
A
Explanation:
Eye should be placed at A because the hole can be seen only, when the angle of incidence is equal to the angle of reflection.
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संबंधित प्रश्न
Write true or false of the following statement.
The image formed by a plane mirror is upright.
In the following diagrams, measure and write the angle of incidence and draw the reflected ray in each case.
In the following diagram, measure and write the angle of incidence and draw the reflected ray.
Define the following term
Angle of incidence
Light is falling on surfaces S1 S2 and S3 as shown in the following figure.
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Surfaces on which the angle of incidence is equal to the angle of reflection is/are
Two mirrors A and B are placed at right angles to each other as shown in the following figure.
A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
There is a mistake in each of the following ray diagrams given as figures a, b, and c. Make the necessary correction (s).
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| (a) | (b) | (c) |
Angle of incidence is greater than the angle of reflection.
Diffused reflection gives a sharp image.
Assertion (A): A ray incident along normal to the mirror retraces its path.
Reason (R): In reflection, the angle of incidence is always equal to the angle of reflection.
