Question

list in proper sequence the steps of the experiment for determining the appropriate focal length of a given concave mirror by obtaining a image of distant object

Answer 1

To find a proper sequence for determining the appropriate focal length first need to use convex lens, because convex lens reflected the main focus.

When this mirror will be proper fixed at proper height then a proper screen will come and this distance between mirror and screen will give a proper image of an distant object.

Answer 2

Answer:

$\sqrt{2}$