Question

ayushi has bought a carpet 7m ​

Answer 1

Answer:

sorry i want some points i dont the answer

Answer 2

Given :- f = -20cm m = +2 because the image is virtual and erect.

To Find :- the position of the object

Solution :-

$m = \frac { - v}{u} = 2 \\ \frac{ - v}{u} = 2 \\ v \: = - 2u$

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\ \frac{1}{ - 20} = \frac{1}{ - 2u} + \frac{1}{u} \\ \\ \frac{1}{ - 20} = \frac{1}{2u} \\ 2u \: = - 20 \\ u = - 10$

Hence, the object is placed at a distance of 10cm from the mirror.