Question

1) An object is placed at a distance of 15 cm from
concave mirrors of focal length 20cm. List
the characteristic of the image formed?​

Answer 1

Answer:

Type of mirror - Concave

distance of object from mirror= 15cm

Focal length= 20cm

=> object is placed between focus and pole

=> Image formed will be formed behind the mirror

=> Image will be virtual and erect

It will be highly magnified

Answer 2

Explanation:

Given that u=−15cm f=20cm

Now by lens formula

1/f = 1/v - 1/u

1/20 = 1/v - 1/-15

1/v= 1/20- 1/15

1/v = -60cm

⇒v=-60cm

The image gets formed at 60 cm to the right of the lens and it will be diminished, inverted and real in nature.