NDA PHYSICS QUIZ - 7

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Question 1:

What type of lenses are used in movie projectors ?

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:

An air bubble in water will act like a?

Question 4:

Total internal reflection cannot take place in which of the following conditions?  

Question 5:

The diameter of a reflecting surface of a spherical mirror is called-

Question 6:

Optical fibre works on the principle of -

Question 7:

The head mirror used by ENT doctors is -

Question 8:

In which of the following is a concave mirror used ?

Question 9:

Scattering is not the reason for which of the following phenomenon?

Question 10:

Which of the following colours have maximum deviation?