00:01
Hi everyone, so the question is saying that when a converging lens is used in a camera and the value of v, that means the distance of image from the camera, distance of imaging, that is equal to v is equal to 0 .2 .0 meter.
00:22
Okay.
00:23
And the value of view that means to the object distance is equal to 4 meter.
00:28
So, we have to the value of view that means to the object distance is equal to 4 meter.
00:30
So we have to find first of all the value of f -kut.
00:35
Okay, so by using lens formula, by using lens formula, what the formula says that 1 by f is equal to 1 by v minus 1 by u.
00:48
So 1 by v that is 1 by 0 .2 .20 minus 1 by 4.
00:54
So by so by this we want that 1 by f will be equal to, so from here, f will be equal to 0.
01:01
0 .2 to 16 meter.
01:03
Now this lens is used in the projector...