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  • A magnifying glass is used, as the object to be viewed can be brought closer to the eye than the normal near point. This results in A. a larger angle to be subtended by the object at the eye and hence viewed in greater detail.

A magnifying glass is used, as the object to be viewed can be brought closer to the eye than the normal near point. This results in
A. a larger angle to be subtended by the object at the eye and hence viewed in greater detail.
B. the formation of a virtual erect image.
C. increase in the field of view.
D. infinite magnification at the near point.

Answers (1)

Right options are - (a, b)

 A magnifying glass simply contains a convex lens of very small focal length.

For magnification when the final image is formed at D and \infty \left ( \text {i.e}, m_{D}\; \text {and}\; m_{\infty } \right ).

                     m_{D}=\left ( 1+\frac{D}{f} \right )_{max} and m_{\infty }=\left (\frac{D}{f} \right )_{min}

By using a magnifying glass, any objects can be brought closer to the eye as compared to the normal near point. The angle formed by the object in the eye is larger and thus, is more detailed. The image formed is virtual erect and is also enlarged.

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infoexpert23

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