00:01
In this problem, you want your makeup or shaving mirror in order to have a magnification of two when you are a distance of 15 centimeters away from the mirror.
00:10
You also want your image to be upright.
00:14
So we want to determine what type of mirror this is and as much as information as you can find from that mirror.
00:20
So for that, we're going to use the magnification equation, which is hi over h -o equals d -i over d -o equals m.
00:31
Only going to be using this portion of the equation.
00:34
So we're going to solve for what d .i is by bringing d .o.
00:41
Up to the top.
00:43
So our distance of the image, we're going to say, is two times my distance of the object, which is 30 centimeters.
00:53
Now, it did say that we wanted this to have an upright image.
01:00
Now, upright images are always virtual images, which will always produce negative distance of the images...