Multiple Choice Question X — task. Science CBSE, Class 10.

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1. A convex mirror of focal length f (in air) is immersed in a liquid

$\mu =\ \frac{4}{3}$ . The focal length of the mirror in liquid will be :

$f$
$\frac{3}{4}\ f$
$\frac{4}{3}\ f$
$\frac{7}{3}\ f$

2. A ray of light is incident on a plane mirror at an angle. If the angle between the incident and reflected rays is

$80^o$ , what is the value of

$\theta$ :

$55^o$
$45^o$
$40^o$
$50^o$

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