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प्रश्न
How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
उत्तर
If a parallel beam of light is incident on a concave mirror, it converges the beam to a point called focus
Type of mirror used is CONCAVE.
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संबंधित प्रश्न
A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown below in the diagram. Select the correct statement about the device (X).
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
Draw suitable diagrams to illustrate the action of (i) concave mirror and (ii) convex mirror on a beam of light incident parallel to the principal axis.
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.
Focal length
What is the relation between focal length and radius of curvature of a concave mirror?
Geometric centre of the spherical mirror is ______.
What is “aperture”?
