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प्रश्न
Mention the types of mirrors used as (i) rear view mirrors, (ii) shaving mirrors. List two reasons to justify your answers in each case.
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उत्तर
(i) Rear view mirrors: Convex mirrors
Reason: (a) Image is formed virtual and erect always.
(b) Image formed is always diminished in size, so it covers large view area.
(ii) Shaving mirrors: Concave mirrors
Reason: (a) Image formed is larger in size so as to see clearly details of the object.
(b) Image formed is virtual and erect when object is placed close to the mirror.
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संबंधित प्रश्न
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
State whether this spherical mirror will diverge or converge light rays.
How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
If a spherical mirror breaks, what type of mirrors are the individual pieces?
Write two more characteristics of the image.
Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror.
The erect image formed by a concave mirror is of size double the size of object. How are u and v related?
Define the following term in relation to concave mirror.
Pole
What is the focal length (f) of a mirror?
