EASY
NDA & NA EE
IMPORTANT
Earn 100

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?

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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 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?
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 36
Two plane mirrors are inclined at an angle of 60° to each other. If an object is placed between them, then the number of images produced will be
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 37
A plane mirror lies face up, making an angle of 15° with the horizontal. A ray of light coming down vertically on the mirror. The angle of incidence, the angle between the reflected ray and the horizontal are respectively.
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 38
In a motor car, spherical mirrors are utilised at two different places,
(i) the head light and
(ii) rear view mirror. What type of mirrors are used?
MEDIUM
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 39
Suppose that a light wave propagates from a point A to another point B and we introduce into its path a glass plate μg=1.33 of thickness t=1 mm. If λ0=500 nm is at A, then the change in wavelength of the wave at B is
EASY
NDA & NA EE
IMPORTANT
Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 8 - Optics>Practice Exercise>Q 40
Two convex lenses of focal lengths f1 and f2 are separated by a distance d. The combination will work as a glass slab, if