Question

a candle flame is placed at a distance of 4 metre from screen how far from the screen should a concave mirror be placed so that it may produce three times magnified image of the candle flame on the screen? ​

Answer 1

Answer:

- 12 m

Explanation:

m= 3

u = 4 m

m = v/u

3=v/-4

v = -12 m

Answer 2

The image is formed at a distance of 12 meters.

Explanation:

Given that,

Object distance from the mirror and the candle flame, u = -4 m

The concave mirror produce three times magnified image of the candle flame on the screen.

The magnification of a concave mirror is given by :

$m=\dfrac{-v}{u}$

$3=\dfrac{-v}{-4}$

v = 12 meters

So, the image is formed at a distance of 12 meters. Hence, this is the required solution.

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