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प्रश्न
Define the term Aperture.
उत्तर
Aperture is the distance between the extreme points on the periphery of the mirror.
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संबंधित प्रश्न
Define Radius of curvature of the spherical mirror
What happens when a ray of light falls normally (or perpendiculary) on the surface of a plane mirror?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What is the advantage of using a carbon paper rather than a white paper?
Name the spherical mirror which can produce a real and diminished image of an object.
Name the kind of mirror used to obtain
(a) a real and enlarged image
(b) a virtual and enlarged image
(c) a real and diminished image, and
(d) a virtual and diminished image.
Name the kind of mirror used to obtain:
A virtual and diminished image
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
(i) between the optical centre and principal focus of a convex lens.
(ii) anywhere in front of a concave lens.
(iii) at 2F of a convex lens.
State the signs and values of magnifications in the above-mentioned cases (i) and (ii).
Define the following term in relation to concave mirror.
Pole
How tall does a mirror have to be to fit an entire person’s body?
