Question

If mirror is placed at 49 cm mark in an experiment to determine focal length of convex mirror by using convex lens and position of image is at |93 cm when mirror is not placed then focal length of mirror is –

• A. 22 cm
• B. 44 cm
• C. 11 cm
• D. None

Answer 1

Answer: (A)

22 cm

Answer 2

f = $\frac { 93 - 49 } { 2 }$ = 22 cm