Light & Optics MCQs with Answers

A beam in which rays are moving away from each other is called _?

• A.Converging beam
• B.Parallel beam
• C.Diverging beam
• D.Reflected beam

Identify the false statement:

• A.Energy of IR is higher than the visible light
• B.Ultraviolet light has higher energy than visible light
• C.X-rays have higher energy than ultraviolet rays
• D.Gamma rays have the highest energy in the electromagnetic spectrum

Optical fiber operates on the principle of ?

• A.Dispersion
• B.Refraction
• C.Total internal reflection
• D.Diffraction

Which of the following phenomenon shows that light is a wave?

• A.Interference
• B.Diffraction
• C.Polarization
• D.All of these

Optical fibres are used in special cameras for what purpose?

• A.Recording ultraviolet radiation
• B.Capturing images in complete darkness
• C.Magnifying distant objects
• D.Seeing inside small spaces

The group containing only electromagnetic waves is ?

• A.Sound waves, Water waves, Radio waves
• B.Sound waves, Light waves, Radio waves
• C.Light waves, Sound waves, Microwaves
• D.Light waves, Radio waves, Microwaves

Special glasses used to observe the solar eclipse are made by the use of _?

• A.Mirrors
• B.Polarizing filters
• C.Prisms
• D.Lenses

Past Paper MCQ

The luminous body emits _?

• A.Radiation
• B.Heat
• C.Sound
• D.Light

What should be done to the focal length of the eyepiece lens to increase the magnifying power of a telescope?

• A.Increased
• B.Decreased
• C.Kept unchanged
• D.Doubled

Which of the following allows all light to pass through it?

• A.Frosted glass
• B.Wood
• C.Air
• D.Brick wall