Question

34. (1)An object of 5 cm height is placed at a distance of 10 cm from a convex mirror of radius of curvature
30 cm. Find the nature, position and size of the image formed.
(2) Ram is given lenses with powers + 5D, -5D, +10D, -10D and -20D. Considering a pair of lenses at
a time, which two lenses will be selected to have a combination of total focal length, when two lenses are
kept in contact in each case:
(a) -10 cm,
(b) 20 cm?​

Answer 1

Answer:

34. (1)An object of 5 cm height is placed at a distance of 10 cm from a convex mirror of radius of curvature

30 cm. Find the nature, position and size of the image formed.

(2) Ram is given lenses with powers + 5D, -5D, +10D, -10D and -20D. Considering a pair of lenses at

a time, which two lenses will be selected to have a combination of total focal length, when two lenses are

kept in contact in each case:

(a) -10 cm,

(b) 20 cm?

answer. b

Answer 2

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