Which one of the following has maximum refractive index?

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 16

The magnifying power of an astronomical telescope for normal adjustment is-

EASY

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 17

Deviation of a thin prism of refractive index $n$ and angle of prism $A$ is-

EASY

12th Bihar Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 9 - Ray Optics and Optical Instruments>Bihar Board-2019>Q 18

Cylindrical lenses are used to correct the eye defect called-

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 $-15 \mathrm{D}$ and $+5 \mathrm{D}$ 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 $10 \mathrm{cm}$. 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 ${\mu }_A$ and refractive index is ${\mu }_B$, then what will be value of $\frac{{\mu }_A}{{\mu }_B}$

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.