Optics Question!?

Question

1) In which of the following cases will the images have similar properties: concave mirror, convex mirror, concave lens, convex lens?

2) Can you get an image on the screen when the distance between the object and the mirror or lens is less than the focal length? explain.

Thanks!

Answer 1

1. Absolute value of magnification >1, concave mirror, convex lens when real image and object closer than screen or when virtual image; <1, convex mirror, concave lens, convex lens when real image and object further than screen.
Upright image: convex mirror, concave lens
2. No. This refers to a real image with a convex lens. When the object is nearer than F, the lens cannot converge the rays on the screen side.
See the ref. for an excellent treatment of lenses.