Light & Optics MCQs with Answers

Splitting of light into its constituent colors is known as?

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

The entire light is reflected into the same denser medium, which is called total?

• A.Internal reflection
• B.External reflection
• C.Partial reflection
• D.Diffuse reflection

Sunlight is made of how many colours?

• A.5 colours
• B.6 colours
• C.7 colours
• D.8 colours

Past Paper MCQ

How many colors does light disperse into after passing through a prism?

• A.Five
• B.Six
• C.Seven
• D.Eight

Binoculars work on the principle of which one of the following?

• A.Total Internal Reflection of Light
• B.Refraction of Light
• C.Dispersion of Light
• D.Interference of Light

The laser produces _?

• A.A beam of a monochromatic coherent light
• B.A beam of white incoherent light
• C.A beam of polychromatic coherent light
• D.A beam of monochromatic incoherent light

Which of the following explains the particle nature of light?

• A.Diffraction
• B.Interference
• C.Photoelectric effect
• D.Polarization

In which type of object do faint shadows form?

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

An object placed in front of a concave mirror at a distance of X cm from the pole gives a 3 times magnified real image. If it is moved to a distance of X+5 cm, the magnification of the image becomes 2. The focal length of the mirror is _?

• A.15 cm
• B.45 cm
• C.30 cm
• D.60 cm

Which type of lens is used in cameras?

• A.Concave lens
• B.Convex lens
• C.Cylindrical lens
• D.Plano-concave lens