A student performed the experiment to determine the focal length of a concave mirror…

PHYSICS · Multi correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A student performed the experiment to determine the focal length of a concave mirror by the

u

v

method using an optical bench of length

1.5\,\mathrm{m}

. The focal length of the mirror is

24\,\mathrm{cm}

. The maximum error in locating the image is

0.2\,\mathrm{cm}

. Five sets of

(u,v)

values recorded by the student, in cm, include

(60,40)

. The data set(s) that cannot arise from the experiment and are incorrectly recorded is/are: (1)

(42,56)

(2)

(48,48)

(3)

(66,33)

(4)

(78,39)