00:01
Hi everyone, in this particular question, we have to find the focal length of mirror, which is concave mirror.
00:09
So the magnification produced by it is three times in large image and object, which is in front of mirror.
00:18
So, the magnification m is equal to minus three because it is in front of mirror or we know that that is image will be real and real and inverted.
00:39
So, and the value of object, which is also in front of mirror, so we take minus 10 centimeter.
00:48
Then we apply the formula of magnification, which is m is equal to minus v upon you.
00:56
From here, we get the value of v.
00:59
So minus 3 is equal to minus v upon minus 10.
01:04
Then the value of v is equal to minus 30 centimeter...