00:01
For the first part of this question, we're going to be making reference to the lens formula, where the inverse of v plus the inverse of you should be equal to the inverse of the focal length.
00:12
And v and you, they are representing the image and the object distance.
00:18
So the inverse of v in this case is going to be equal to the inverse of 10 to the power negative 4 minus the inverse of 1 5 by 10 to the power 7.
00:27
So if we look at this term, it is raised to the power of 7, so it is going to be approximately equal to 0.
00:36
So the value of fee is going to be equal to 10 to the power negative form in units of kilometers, which is as good as 10 centimeters.
00:45
So the image should be placed at a distance that is 10 centimeters to get a sharp image.
00:52
And moving on to the next part, as for the magnification, the magnification is the image.
00:57
Magnitude of negative v over u.
01:01
And we are looking at 10 to the power negative 4 divided by 1 5 by 10 to the power 10 to the power 7.
01:09
This gives us a magnification that is equal to 6 .67 by 10 to the power negative 1 .3...