KVPY SA Exam 2013 Question Paper

Question : 23 of 80

Marks: +1, -0

In a car a rear view mirror having a radius of curvature 1.50 m forms a virtual image of a bus located 10.0 m from the mirror. The factor by which the mirror magnifies the size of the bus is close to

0.06
0.07
0.08
0.09

Validate

Solution:

u = - 10 m
R = 1.5 m

1/\v+1/\u=2/\R

1/\v-1/10=2/1.5

\v=30/43

m=-\v/\u=30/{43×10} ≃0.07

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