EASY
JEE Main
IMPORTANT
Earn 100

In which of the following the final image is erect?

50% studentsanswered this correctly

Important Questions on Optical Instruments

EASY
JEE Main
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
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>OBJECTIVE II>Q 4

Mark the correct options.

EASY
JEE Main
IMPORTANT
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,

EASY
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
EASY
JEE Main
IMPORTANT
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.
EASY
JEE Main
IMPORTANT
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?

EASY
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?
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 19 - Optical Instruments>EXERCISES>Q 5
A simple microscope is rated 5x for a normal relaxed eye. What will be its magnifying power for a relaxed farsighted eye whose near point is 40 cm?