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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.
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
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.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
Does the mirror mentioned in part (b) form real image for all locations of the object?
The image formed by a convex mirror is
Define the term Pole.
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
