00:01
So we have a convex mirror, which has a center of curvature of 22 centimeters.
00:06
So what that means is it's got a focal length of half that, so 11 centimeters, or really negative 11, meaning it's behind, on the other side of the mirror.
00:16
And we place an object 16 .5 centimeters away from this mirror.
00:22
So this is our object distance, and this object has a height of 0 .6 centimeters.
00:29
So let's first figure out where the image is going to be located.
00:32
So we have one over the image height plus one over the object height is equal to negative one over the focal length.
00:41
Or we'll take the focal length to be negative.
00:43
So we'll just say one over f.
00:44
So our image distance or the reciprocal is given by 1 over f minus 1 over d0.
00:52
So this is negative 1 over 11 minus 1 over 16 .5.
01:01
And this gives us an image distance of negative 6 .6 .6.
01:06
So this would be centimeters, and this is behind the lens.
01:11
So maybe about right there or something like that.
01:16
And so the magnification of this is the negative of the image distance divided by the object distance...