A mirror has only one focus but a lens has two. Why?

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A mirror has only one focus but a lens has two. Why?

help me to solve this?

2007-06-24 16:26:18 · 4 answers · asked by zubair y 1 in Science & Mathematics ➔ Physics

4 answers

lense has one on each side

2007-06-24 16:29:21 · answer #1 · answered by The Instigator 5 · 0⤊ 0⤋

A lens has a concave and convex side. Each gives a different focus. A Mirror only has one flat image.

2007-06-24 23:30:13 · answer #2 · answered by microbioguy 3 · 1⤊ 0⤋

A double concave mirror would equivalently have two foci like a double convex lens. However, you might be going after the fact that a lens is focusing through transmission which is bidirectional, whereas a mirror focuses through reflection which is necessarily unidirectional.

2007-06-24 23:54:01 · answer #3 · answered by jcsuperstar714 4 · 0⤊ 1⤋

1 curved surface versus 2 curved surfaces

2007-06-24 23:29:33 · answer #4 · answered by special-chemical-x 6 · 0⤊ 0⤋