How will you distinguish between a convex lens ans a concave lens:

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Solution

Keep the lens close to some printed matter and see the image of the printed matter through it. If the letters appear enlarged then it is convex lens and if they appear diminished then it is a concave lens.

We can distinguish convex and concave lens simply by watching, If the lens is thicker at center and thinner at end then this is a convex lens and if thinner at center and thicker at ends then this is concave lens.

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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.

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