NSO Level 1- Science Olympiad (SOF) Class 7: Questions 1 of 660

Question

MCQ▾

Which one of the following lens is used by watch repair mechanics?

Choices

Choice (4)Response

a.

Concave lens

b.

Convex lens

c.

Plane lens

d.

None of the above

Answer

b.

Explanation

A convex lens is used by watch repair mechanics. If the object is kept between the focus and optical centre of a convex lens, the image will be enlarged and erect. Therefore, a convex lens is used by watch repair mechanics to see parts of watch clearly.

Lens Used by Watch Repair Mechanics

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