Question

29. (a) It is desired to obtain an erect image
of an object, using a concave mirror of
focal length 20 cm.
(i) What should be the range of
distance of the object from the mirror?
(ü) Will the image be bigger or
smaller than the object?
(iii) Draw a ray diagram to show the
image formation in this case.
(b) An object 5 cm in length is held 25
cm away from a converging lens of focal
length 10 cm. Find
the position and the nature of the image
formed.​

Answer 1

Answer:

Object distance should be less than the focal length for the formation of an erect image. Hence, the range of distance of object from the mirror should be less than 15 cm i.e. from 0 to 15 cm in the front of mirror from the pole. The nature of image so formed will be virtual and erect.

Explanation:

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