Light & Optics MCQs with Answers

Which of the following wavelength ranges is associated with UV spectroscopy?

• A.100 - 10 nm
• B.700 - 400 nm
• C.1000 - 700 nm
• D.400 - 100 nm

In UV-Vis spectroscopy, which law describes the relationship between absorbance, concentration, and path length of a sample?

• A.Kirchhoff's Law
• B.Snell's Law
• C.Brewster's Law
• D.Beer-Lambert Law

A telescope is an instrument that gathers _ from distant sources.

• A.Heat
• B.Sound
• C.Light
• D.Radio waves

Speed of light was first determined by

• A.Isaac Newton
• B.Albert Einstein
• C.Ole Romer
• D.Galileo Galilei

Mirror used by dentist to see large images of teeth of patients is:

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

The picture tube of a black and white T.V. set has only one electron gun that produces the picture on its screen. The number of electron guns a colour picture tube has, is:

• A.2
• B.3
• C.4
• D.5

How many primary colors are there?

• A.2
• B.3
• C.5
• D.7

A man is ordering a lens to use as a reading glass. He should order ?

• A.A small convex lens with long focal length
• B.A large concave lens with short focal length
• C.A large convex lens with short focal length
• D.A small concave lens with long focal length

At what angle above the horizon must the sun be to create a rainbow?

• A.30 degrees
• B.60 degrees
• C.50 degrees
• D.40 degrees

Distant objects can be seen with the help of ?

• A.Microscope
• B.Stethoscope
• C.Periscope
• D.Telescope