Question

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is​

Answer 1

Answer:

As object and image are located at the same point and in front of concave mirror then we take u = +30 cm and v = + 30 cm. ... Thus, the focal length of mirror is 15 cm

Answer 2

Answer:

$the \: focal \: length \: of \: the \: mirror \\ \\ \\ \\ \\ \\ \\ \\ \\ hope \: its \: useful \\ \\ \\ \\ \\ \\ by \: nisha$