Question

If 20 cm tall object is placed at a distance of 45 cm from a plane mirror
find
a. How far will be the image formed behind the mirror?
b. What will be the size of the image formed?
c. If the object is moved by 5 cm towards the mirror, what will be the
distance between the object and its image?

Answer 1

Answer:

For plane mirrors, the object distance (often represented by the symbol do) is equal to the image distance (often represented by the symbol di). That is, the image is the same distance behind the mirror as the object is in front of the mirror.

For example, if we stand at a distance of 2 meters from a plane mirror, we must focus at a location 2 meters behind the mirror in order to view our image.

In this case, the distance between the object and its image formed by a plane mirror appears to be 24 cm. So, the object distance will be 24 / 2 = 12 cm.

Hence, the distance between the mirror and the object is 12 cm.

Answer 2

Answer:

a)45cm( the property of plane mirror states that the distance of image is formed is equal to the distance of object from mirror)

b)20cm , same as the object .(the size of the image is same as the size of the object according to the property of the plane mirror)

c)40+40=80cm

hope it may help you