Physics

Physics

Problem

While shaving, a person holds his face 15 cm in front of a mirror and sees an erect image that is twice the size of his face. Calculate the focal length of the mirror. a) −10 cm-10\,\text{cm} b) +10 cm+10\,\text{cm} c) −30 cm-30\,\text{cm} d) −7.5 cm-7.5\,\text{cm}

Browse the problem library