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A point object is placed on the axis of the concave mirror at a distance of  from the focal point of the mirror. Its image is formed at the point of object, then focal length of the mirror is

a)

15

b)

30

c)

60

d)

120



Question ID - 152961 | SaraNextGen Top Answer

A point object is placed on the axis of the concave mirror at a distance of  from the focal point of the mirror. Its image is formed at the point of object, then focal length of the mirror is

a)

15

b)

30

c)

60

d)

120

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

Since the image is formed at the point of object  object is kept on the radius of curvature

127 votes


127