Question

Here's my question ...
Q- The shiny Outer surface of a hollow sphere of aluminum of radius 50cm is to be used as mirror:
a) What will be the focal length of this mirror?
b) Which type of spherical mirror will it provide ?
c) State whether this spherical mirror diverge or converge light rays ??

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CLASS - X
PHYSICS
CH- LIGHT

Please Help !!!

Answer 1

The focal length of the mirror will be 50/2 = 25 cm
The outer surface of a hollow sphere of aluminium will act as a convex mirror. 


Mark as brainlist please

Answer 2

$\huge \boxed{ \bf{answer}}$


$\boxed{ \bf{given}}$

Radius of the hollow sphere = 50 cm


$\boxed{ \bf{solution}}$

a) We know,

$= > radius = 2(focal \: length)$

$= > \: f = \frac{r}{2}$

$= > \: f = \frac{50}{2}$

$= > f = 25$

Therefore, focal length = 25 cm


b) As, the focal length i.e 25 cm is positive . So the mirror used is
$\bf{convex \: mirror}.$


c) As, the mirror is convex , so it
$\bf{diverge \: light \: rays}.$


$\boxed{ \bf{uses \: of \: convex \: mirror \div }}$

I>> Convex mirror is uses as rear view mirror in cars because it diverge the lights and give more field of view

2>> It is used in shops , parking areas etc. as a security camera