NDA PHYSICS QUIZ - 16

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Question 1:

The head mirror used by ENT doctors is -

Question 2:

An object is placed 12 cm in front of a convex lens of focal length 16 cm. What is the nature of the image formed?

Question 3:

What is the radius of curvature of a plane mirror?

Question 4:

A ray of light travelling from a rarer medium to a denser medium :-

Question 5:

At what angle should two plane mirrors be placed to obtain three images of an object?

Question 6:

An object is placed at a distance of 60 cm from a concave mirror. What should be the focal length of the concave mirror to get its magnification of 1/2?

Question 7:

On which principle does a periscope work?

Question 8:

An air bubble in water will act like a?

Question 9:

What is the reason for the small air bubbles in the water collected in a glass vessel to shine with a silvery luster?

Question 10:

Where should an object be placed in front of a convex lens to get a real and enlarged image of the object?