MEDIUM
10th Nagaland Board
IMPORTANT
Earn 100

Draw a ray diagram and describe the image formation by a concave lens when an object is placed at (i) infinity (ii) a finite distance.

Important Questions on Light - Reflection and Refraction

EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 9
Where should an object be placed in front of a convex lens to get a real image of the size of the object? 
EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 10
The change in focal length of an eye lens is caused by the action of the
EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 11
Define power of a lens. What is its unit?
MEDIUM
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 12
An object 4 cm in size is placed at 25 cm in front of a concave mirror of focal length 15 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Find the size of the image.
MEDIUM
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 13
A concave lens has focal length 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also find the magnification produced by the lens.
EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 14
The type of mirror or lens used by dentist is _____.
EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 15
The type of mirror or lens used in cameras is _____.
EASY
10th Nagaland Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Nagaland Board-2020>Q 16
The type of mirror or lens used in a Rare view mirror of vehicles is _____.