Question

An object of the height of 10cm is placed at a distance of 20 cm in front of a mirror.
Its image is found at the same distance when it is placed.

a) What is the type of the mirror?
b) Is the image real or virtual?
c) What is the height of the image?

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Answer 1

h=10 , u=-20 , v=-20

m=h'/h=-v/u

=h'/10=-(-20)/-20

= h' =20×10/-20

h'=200/-20=-10

a) concave mirror

b) real

c) -10

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