1.

A bus of length 5m is behind the car having the back view mirror of back radius of 2m. What will be the length of image when a bus 10m away.

Answer»

h = 5

r = 2m

d = r/2 = 1 m

u = -10 m

\(\frac1f=\frac1v+\frac1u\)

\(\frac11=\frac1v-\frac1{10}\)

\(\frac1v=1+\frac1{10}\)

\(\frac1v=\frac{11}{10}\)

v = \(\frac{10}{11}\)

M = \(\frac{h_i}{h_o}\)

\(\frac{h_i}{h_o}= \frac{-v}{u}\)

\({h_i} = \frac{-v}{u}\times h_o\)

\(h_i=\frac{-10}{11}\times\frac{1}{-10}\times5\)

\(h_i=\frac5{11}\)



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