Optics-Lenses-- 1cm thick glass slide is perpendicularly set
I don't know how to do the question below. It doesn't say whether the whole system in in the air or in a more refractive "environment" (i.e. submerged in oil). It too doesn't say the exact position where the lens is set, and I think...
Optics-Lenses -- image outside the mirror?
A question in my book asks what are the images formed in this diagram:
http://www.flickr.com/photos/80147355@N05/7362964734/sizes/m/in/photostream/
I thought there was only one, inside the mirror. But it turns out that there is another one...