EASY
NDA & NA EE
IMPORTANT
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In Rayleigh scattering, the degree of scattering is proportional to fourth power of wavelength, but the size of the scattering particles of the medium should be

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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 28
Which one of the following optical instruments produce a virtual image
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 29
Focal length of the eye lens which enables us to see the object at varying distances, is controlled and changed by
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 30
Which one of the following is correct? Large aperture in telescopes are used for
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 31
In a healthy human eye, the focusing is done by
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 32
The human eye has essentially a lens and a retina used as a screen. Which one of the following statements is true about this combination of lens and retina?
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 33
The region of retina in which the vision is most acute is
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 34
Defect of colour blindness can be remedied by the use of
MEDIUM
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 35
Which one of the following is used to remove astigmatism for the human eye?