A highly polished surface, such a mirror, reflects most of the light falling on it. You are already familiar with the laws of reflection
of light. (i) The angle of incidence is equal to the angle of reflection, and (ii) The incident ray, the normal of the mirror at the point
of incidence and the reflected ray, all lie in the same plane. These laws of reflection are applicable to all types of reflecting
surfaces including spherical surfaces. You are familiar with the formation of image by a plane mirror. What are the properties of
the image ? Image formed by a plane mirror is always virtual and erect. The size of the image is equal to that of the object. The
image formed is as far behind the mirror as the object is in front of it. Further, the image is laterally inverted.
(i) A mirror is (1)
(a) a highly polished surface which reflects light (b) any surface which reflects light
(c) a surface which reflects light (d) none of these
(ii) The law of reflection states(a) Sine of angle of incidence to the sine of angle of reflection is constant.
(b) The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in same plane.
(c) A mirror causes right – left inversion. (d) None of these.
(iii) The image formed by a plane mirror is (1)
(a) real and inverted (b) virtual and inverted (c) virtual and erect (d) real and erect
(iv) The image formed by a plane mirror is (1)
(a) Bigger than the object (b) smaller than the objet (c) of same size as that of
the object (d) depends upon the size of the mirror
(v) In a plane mirror the image is formed (1)
(a) in front of the mirror (b) behind the mirror (c) in the mirror (d) none of these
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Answer:
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