Uses of convex and concave lens ?

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Solution

Convex lenses: Providing magnification - reading glasses, magnifying glass, etc. Not specifically to magnify, but correcting far-sighted vision by adjusting the focal length of the eye’s lens (and cornea, which provides about half of the focusing power that creates the image on the retina.)

Concave lenses: In daily life, primarily correcting near-sighted vision

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Similar questions

1) state two practical use of convex lens and concave lens?

Question 4

You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either

(a) concave mirror or convex mirror.

(b) concave mirror or convex lens.

(d) concave lens or convex lens.

Question 7

You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from

(a) both concave lens and convex lens.

(b) both concave mirror and convex mirror.

(d) Both convex mirror and concave lens.

Q. Which lens is used in peepholes of the door?
a)concave lens
b)convex lens

Why focal length of convex mirror and convex lens is positive while concave mirror and concave lens negative?

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