Convex lenses converge or concentrate light to a
focus if the image is further from the lens that its focal length.
What is it like to look
through?
1 Close to object - it magnifies.
2 Far from eye - image upside
down.
Uses of convex lenses Eye, camera,
overhead projector, focus sunlight, projector
microscope, simple telescope,
glasses (to correct for long sight), magnifying glass
Concave lenses diverge or spread out the light. There is no real focus. Image
is always virtual. Power is negative.
What is it like to look through?
The image
that you see is always the right way up and smaller.
Uses of concave lenses Glasses (to correct for short sight), spy holes in doors,
some telescopes,
back window of coaches