EASY
NDA & NA EE
IMPORTANT
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The boundaries of a block of transparent material are found to be completely invisible when placed in a liquid of refractive index μ. This is possible only if the refractive index of the material of the block is,

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Important Questions on Optics

EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 5
The blue colour of the sky can be attributed to,
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 6
If a man approaches a plane mirror at a rate of 2 km h-1, then his image would approach him at a rate of,
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 7
Which one of the following diagrams correctly illustrates the refraction of a normally incident ray of light through a glass slab?
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 8
Which one of the following is the correct arrangement in the decreasing order of the refractive indices of glass, diamond and water?
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 9
When light passes from air into glass, it experiences change of
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 10
The correct sequence of the decreasing order of velocity of light in glass, diamond and water is
HARD
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 11
If the refractive indices of water and that of glass with respect to air are 4/3 and 3/2, respectively, then the refractive index of glass with respect to water is,
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 12
When a ray of light is reflected under multiple reflections by a set of plane parallel mirrors, then the intensity of the ray diminishes due to