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Which one of ...

Question

Which one of the following is the use of concave lens

A

magnifying glass

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B

objective lens of a microscope and a telescope

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C

in theatre spot lights

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D

all of the above

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Solution

The correct option is D
all of the above

Concave lens is used in optical instruments. In other mentioned options, concave lens is not used.

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Similar questions

Q. Which of the following statements are true in the context of a compound Microscope?
(A) Each lens produces a virtual and inverted image
(B) The objective has a very short focal length
(C) The eyepiece is used as a simple magnifying glass
(D) The objective and eyepiece are convex and concave lenses respectively

Q. State whether true or false :

A concave lens is used as a magnifying glass

Q. Given below are two statements.

Assertion : If objective lens and eyepiece of a compound microscope are interchanged then it can work as telescope.

Reason : The objective lens of the telescope has small focal length.

Based on the above statements, choose the correct alternative.

Q. A manufacturer uses a concave lens instead of a convex lens in a magnifying glass by mistake. What will be the effect on the working of the lens?

Q. The magnifying power of an objective lens of a compound microscope is

8

if the magnifying power of the compound microscope is

32

. Then calculate magnifying power of an eyepiece lens.

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