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प्रश्न
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
उत्तर
To distinguish between a plane mirror, concave mirror and convex mirror, the given mirror is held near the face and image is seen. There can be following three cases:
Case (i): If the image is upright, of same size and it does not change in size by moving the mirror towards or away from the face, the mirror is plane.
(ii) If the image is upright and magnified, and increases in size on moving the mirror away, the mirror is concave.
(iii) If the image is upright and diminished and decreases in size on moving the mirror away, the mirror is convex.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Centre of curvature
Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Define the Focal length of a spherical mirror
Name the mirror which always produces an erect and virtual image. How is the size of image related to the size of object?
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Define the term Focus of a concave mirror.
The image formed in a plane mirror is always inverted.
