To find the focal length of a convex mirror, a student records the following data : Object Pin Convex Lens Convex Mirror Image Pin 22.2 cm 32.2 cm 45.8 cm 71.2 cm The focal length of the convex lens is f_1 and that of mirror is f_2. Then taking index correction to be negligibly small, f_1 and f_2 are close to: [Main 9 Apr 2016]

Correct Answer is : f1=7.8cm f2=12.7cm

Ray Optics and Optical Instruments Part 1

Section: Physics

Question : 72 of 100

Marks: +1, -0

To find the focal length of a convex mirror, a student records the following data :

Object Pin	Convex Lens	Convex Mirror	Image Pin
22.2 cm	32.2 cm	45.8 cm	71.2 cm

The focal length of the convex lens is f1 and that of mirror is f2. Then taking index correction to be negligibly small, f1 and f2 are close to:

[Main 9 Apr 2016]

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