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IMPORTANT
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When we see an object, the image formed on the retina is

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Important Questions on Optical Instruments

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JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE II>Q 2

In which of the following the final image is erect?

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IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE II>Q 3
The maximum focal length of the eye-lens of a person is greater than its distance from the retina. The eye is
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IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE II>Q 4

Mark the correct options.

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CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE II>Q 5

The focal length of the objective of a compound microscope is fo and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument,

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JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>EXERCISES>Q 1
A person looks at different trees in an open space with the following details. Arrange the trees in the decreasing order of their apparent sizes.
Tree Height (m) Distance from the eye (m)
A 2.0 50
B 2.5 80
C 1.8 70
D 2.8 100
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CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>EXERCISES>Q 2
An object is to be seen through a simple microscope of focal length 12 cm. Where should the object be placed so as to produce the maximum angular magnification? The least distance for clear vision is 25 cm.
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CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>EXERCISES>Q 3

A simple microscope has a magnifying power of 3.0 when the image is formed at the near point (25 cm) of a normal eye.

(a) What is its focal length?

(b) What will be its magnifying power if the image is formed at infinity?

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JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>EXERCISES>Q 4
A child has near point at 10 cm. What is the maximum angular magnification the child can have with a convex lens of focal length 10 cm?