EASY
12th West Bengal Board
IMPORTANT
Earn 100

What do you mean by least distance of distinct vision? What is its value?

Important Questions on Human Eye and Optical Instruments

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 8

What do you mean by power of accommodation?

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 8

What do you mean by adaptation by eye?

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 8

What do you mean by near point of an eye? 

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 8
What do you mean by far point of an eye?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 9
What is the most common type of defect of vision that old people suffer from? What is the remedy of this defect?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 10
Street lamp-posts appear to be shorter the farther they are away, although all are of same height. Why does it happen so?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 10

When the lights of a brightly lit room are suddenly put out, the people of the room are blinded for a moment. Why?

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 16 - Human Eye and Optical Instruments>EXERCISE 16>Q 11
A person wears bifocal converging spectacles, one surface of each lens being spherical and the other cylindrical. State the defects in his vision and explain how the spectacles correct them.