EASY
12th Bihar Board
IMPORTANT
Earn 100

Cylindrical lenses are used to correct the eye defect called-

50% studentsanswered this correctly

Important Questions on Ray Optics and Optical Instruments

EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 19
Equivalent focal length of two lenses in contact having power -15 D and +5 D will be-
MEDIUM
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 20
Two thin convex lens of power +5 and +4 diopter are placed co-axially at a distance 10 cm. Find the focal length of the combination.
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 21
Differentiate between primary and secondary rainbow.
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 22
Velocity of light in a medium A is v and velocity of light in medium B is 2v. If refractive index of medium A is μA and refractive index is μB, then what will be value of μAμB
HARD
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 23
With neat diagram describe the construction and working of an astronomical telescope and its magnifying power.
HARD
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 24
What is dispersive power? Find the necessary conditions for obtaining deviation without dispersion by two thin prisms.
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2020>Q 25
The lens which is used to cure short sightedness is :
EASY
12th Bihar Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2020>Q 26
The refractive index of diamond is about :