Question

A concave mirror forms a sharp image of a distant tree. What is the separation between the mirror and the screen called?

Answer 1

1. When an object is placed at a large distance from the mirror, then the image is formed at a focal point of the mirror.
2. A concave mirror forms a real image of a distant object.
3. A real image is obtained on the screen.

Final answer: The separation between the mirror and the screen is equal to the focal length of the mirror.