Light & Optics MCQs with Answers

In mirrors, if image distance (q) is positive, the image will be:

• A.Diminished
• B.Virtual
• C.Erect
• D.Real

Bending ability of light when passing from one medium to another is commonly observed in the phenomenon of ?

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

Central color of rainbow is?

• A.Red
• B.Green
• C.Violet
• D.Yellow

A periscope is an optical instrument that uses mirrors to reflect images through a tube. The mirrors are placed at an angle of _?

• A.30 degrees
• B.45 degrees
• C.60 degrees
• D.90 degrees

Past Paper MCQ

The speed of light in vacuum is about

• A.300,000 kilometers per second
• B.150,000 kilometers per second
• C.500,000 kilometers per second
• D.1,000,000 kilometers per second

Where are convex mirrors placed to prevent collisions or accidents?

• A.At blind turns of roads
• B.In parking lots
• C.Both a and b
• D.Inside rear-view mirrors only

The formula of Lens power is:

• A.2f
• B.f/2
• C.1/f
• D.f²

Spectroscopy is the interaction of light with ?

• A.Matter
• B.Energy
• C.Sound
• D.Magnetic field

Two glass prisms P1 and P2 are to be combined together to produce dispersion without deviation. The angle of the prisms P1 and P2 are selected as 4° and 3° respectively. If the refractive index of prism P1 is 1.54, then that of P2 will be _?

• A.1.62
• B.1.72
• C.1.82
• D.1.92

The fringe spacing increases if we use:

• A.Blue light
• B.Green light
• C.Red light
• D.Violet light