Light & Optics MCQs with Answers

Past Paper MCQ

Which material provides a shield against gamma rays?

• A.Aluminum
• B.Lead
• C.Glass
• D.Plastic

The optical phenomenon in which the splitting of white light into seven distinct colors occurs is called?

• A.Refraction
• B.Scattering
• C.Diffraction
• D.Dispersion

Which type of mirror is used in the headlights of cars and torch lights?

• A.Concave mirror
• B.Convex mirror
• C.Plane mirror
• D.Cylindrical mirror

When light passes through a prism, _ occurs to form a spectrum.

• A.Diffraction
• B.Reflection
• C.Refraction
• D.Dispersion

White light from the sun shines on a green leaf. The leaf will look green because the leaf.

• A.green color is transmitted through
• B.green color is absorbed by
• C.all colors except green are reflected by
• D.green color is reflected by

Which phenomenon explains why the sky appears blue to the human eye during the day?

• A.Diffraction of light around dust particles in the upper atmosphere
• B.Refraction of sunlight by water droplets in the atmosphere
• C.Rayleigh scattering of shorter wavelengths of light by atmospheric particles
• D.Mie scattering of all wavelengths equally by large atmospheric particles

In which object do shadows not form?

• A.Opaque object
• B.Translucent object
• C.Transparent object
• D.Luminous object

Maxwell's equations predict that the speed of light in free space is ?

• A.dependent on amplitude
• B.dependent on frequency
• C.dependent on wavelength
• D.independent of frequency

Which one of the following is a non-luminous object?

• A.Sun
• B.Star
• C.Moon
• D.Glowing bulb

A process in which light rays fall on any material object and these rays bounce back is known as?

• A.Refraction
• B.Reflection
• C.Diffraction
• D.Dispersion