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IMPORTANT
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A normal eye is not able to see objects closer than 25 cm because

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Important Questions on Optical Instruments

EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 4
When objects at different distances are seen by the eye, which of the following remains constant?
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 5
A person A can clearly see objects between 25 cm and 200 cm. Which of the following may represent the range of clear vision for a person B having muscles stronger than A, but all other parameters of eye identical to that of A?
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 6
The focal length of a normal eye-lens is about
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JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 7
The distance of the eye-lens from the retina is x. For a normal eye, the maximum focal length of the eye-lens
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 8
A man wearing glasses of focal length +1 m cannot clearly see beyond 1 m
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 9
An object is placed at a distance u from a simple microscope of focal length f. The angular magnification obtained depends
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JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 10
To increase the angular magnification of a simple microscope, one should increase
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE I>Q 11
A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power 5× before his eyes. The angular magnification achieved is