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  4. A driving mirror consists of a cylindrical mirror of radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is

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Q. A driving mirror consists of a cylindrical mirror of radius of curvature $10 \,cm$ and the length over the curved surface is $10 \,cm$. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is

Ray Optics and Optical Instruments

Solution:

$f=\frac{R}{2}=5 \,cm$
$\theta=\frac{10}{5}=2\,rad$

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