Question

Two concave mirrors are kept in a straight line as shown in fig. Mirror A forms 2 times enlarged real image of an object kept in front of it on the same straight line. The focal length of mirror A is given as 10cm.

i. Using sign conventions calculate the object position and image position in the case of mirror A
ii. Mirror B forms a 1/4times diminished real image of the same object. Find the object position, image position and the focal length in this
case.
iii. Draw the ray diagrams in both the cases.
3

Answer 1

For mirror A:

Object distance from mirror is 15 cm

Image distance from mirror is 30 cm

For mirror B;

Object distance = 15 cm

Image distance = 3.75 cm

Focal lenght = 3 cm

Step-by-step explanation:

Detailed explanation and calculation is shown in the images below.