Physics
A man standing in front of a plane mirror finds his image to be at a distance of 6 metre from himself. The distance of man from the mirror is:
- 6 m
- 3 m
- 2 m
- 12 m
Reflection of Light
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Answer
3 m
Reason — The distance of image from the mirror = The distance of object from the mirror. Since the distance between the man and image is 6 m, so the distance between mirror and man is 3 m.
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Related Questions
Fill in the blanks:
(a) Angle of incidence = ……………
(b) The incident ray, the reflected ray and the normal lie ……………
(c) The image formed by a plane mirror is at a distance behind the mirror as …………… .
(d) The image formed by a plane mirror is …………… and …………… .
(e) We are able to see the objects around us due to …………… reflection.
(f) A …………… image cannot be obtained on a screen.
(g) One surface of mirror is made opaque by …………… it followed by a thin coating of paint of lead oxide.
(h) A plane mirror …………… reflect 100 percent light falling on it.
(i) The colour of an opaque object is the colour of light which it …………… .
(j) Magenta, cyan and yellow are the …………… colours.
Match the following:
Column A Column B (a) A light ray passes from air to glass (i) speeds up (b) A light ray passes from glass to water (ii) reflects red light (c) Virtual image (iii) primary colours (d) Red rose (iv) plane mirror (e) Red, green and blue (v) slows down The angle between the incident ray and the ray reflected from the plane mirror is 70°. The angle of incidence will be:
- 70°
- 30°
- 35°
- 90°
The image formed by a plane mirror is:
- virtual and inverted
- virtual and of same size
- real and inverted
- real and of same size