Question

The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is

a) $\sf\dfrac{f+x}{f}$

b) $\sf\dfrac{f}{x}$

c) [tex}\sf\sqrt{\dfrac{f}{x}}[/tex]​

Answer 1

Explanation:

Hence, focal length f = -f. The distance of the object from the principal focus is p. Hence, the distance of object from the mirror [ u ] = p+ f.

Answer 2

Answer:

Hence, focal length f = -f. The distance of the object from the principal focus is p. Hence, the distance of object from the mirror [ u ] = p+ f.