A concave mirror has a focal length of 25 cm. At which of the following distace should
Channel: Doubtnut
Date: 2020-01-26

A concave mirror has a focal length of 25 cm. At which of the following distace should a person hold his fce from this concave mirror so that it may act as a shaving mirror ? (a) 45 cm (b) 20 cm 25 cm (c ) 25 cm (d) 30 cm Give reason for your choice.