Question

A student wants to project the image of a candle flame on a screen 80 cm in front of a mirror by keeping the candle flame at a distance of 20 cm from its pole.
(1)Find the magnification of the image produces
(2)Draw a ray diagram to show the image formation in this case and maek the distance between the object and the image

Answer 1

a)The type of the mirror is Concave mirror
b) Linear Magnification of the image produces (m) = -v/u 
u = -20 cm
v = -80 cm
m = -v/u = -80/-20 = 4
c)The distance b/w the object and the mirror is 20 cm.
d) Ray diagram - object between F and C.

Answer 2

Magnification of the image produced is -4

Given

distance of image =  80 cm

distance of object = 20cm

To Find

We need to find the magnification of image produced.

Solution

Here a concave mirror is used to get the image.

Object distance, u = - 20 cm

image distance, v = - 80 cm;

magnification, m = x

m = $\frac{-v}{u}$ = - $\frac{-80}{-20}$ = -4

Distance between the object and its image = v - u

                                                                       = 60 cm

Magnification is - 4 and distance between object and image is 60cm

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