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प्रश्न
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
उत्तर
The position of the object is 12 cm in front of the mirror.
Its size is 1 cm.
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संबंधित प्रश्न
A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection
How will you distinguish between a plane mirror, a concave mirror and a convex mirror, without touching them?
The image formed by a convex mirror is of size one third the size of object. How are u and v related?
At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object.
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.
Focal length
Define the term Centre of curvature.
The diagram below shows the parallel rays incident on a convex mirror. C is the centre of the curvature of the mirror. By drawing the paths of the reflected rays, label the focus F and hence find the focal length of the mirror.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
