Question

CASE STUDY.
A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror
(1) Which of the following type of mirror is used in above lines?
(a) Convex mirror
(b) Concave mirror
(c) Plane mirror
(d) none of these
(ii) The distance of the image from the object is
(a) 0 cm
(b) 10 cm
(c) 50 cm
(d) 100 cm
(ii) The focal length of the mirror is
(a) - 10 cm
(b) - 15 cm
(c) -20 cm
(d) -25 cm
(iv) Rays from Sun converge at a point 15 cm in front of a concave mirror. Wheſe should an object be placed so that size of
is image is equal to the size of the object?
(a) 15 cm in front of the muror
(b) 30 um in front of the mirror
(c) Between 15 cm and 30 cm in front of the mirror
(d) More than 30 cm in front of the mirror

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Answer 1

1. (b)
2. (a)
3. (d)
4. (b)

Hope this answer helps you ^_^ !

Answer 2

Answer:

1. (b) Concave mirror, as magnification is always negative in a concave mirror

2. 50 cm

3. -25 cm

4. 30 cm in front of the mirror