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प्रश्न
What is the relationship between the focal length and radius of curvature?
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उत्तर
The relationship between the focal length, f, and radius of curvature, r is
f = 1/2 x r.
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संबंधित प्रश्न
An image formed by a ______ mirror is always of the same size as that of the object.
What type of image is formed:
in a plane mirror?
Write the formula for a lens connecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
State the types of mirrors used for (i) headlights and (ii) rear view mirror, in cars and motorcycles. Give to justify your answer in each case.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
Name the kind of mirror used to obtain:
A real and diminished image.
State the kind of mirror used
(a) By a dentist,
(b) As a search-light reflector.
Define the following term in relation to concave mirror.
Principal focus
