Quiz on Light and Heat Transfer

Which of the following is not a property of light?

• It travels in straight lines

• It needs a medium to travel

• It can be reflected

• It can be refracted

The speed of light in air is approximately:

• 3 × 10⁵ m/s

• 3 × 10⁶ m/s

• 3 × 10⁸ m/s

• 3 × 10⁷ m/s

Which type of mirror is used in a car’s rear-view mirror?

• Concave

• Convex

• Plane

• Cylindrical

Which phenomenon allows us to see objects that are not directly in front of us?

• Refraction

• Reflection

• Dispersion

• Diffraction

A rainbow is formed due to:

• Reflection only

• Refraction and dispersion

• Diffraction only

• Polarisation only

Which of the following travels fastest?

• Sound in air

• Sound in water

• Light in vacuum

• Light in glass

The bending of light as it passes from one medium to another is called:

• Reflection

• Refraction

• Diffraction

• Polarisation

Which of the following is true for light waves?

• They are longitudinal waves

• They are electromagnetic waves

• They are mechanical waves

• They need a medium to travel

The image formed by a plane mirror is always:

• Real and inverted

• Virtual and upright

• Real and upright

• Virtual and inverted

The angle between the incident ray and the normal is called:

• Angle of deviation

• Critical angle

• Angle of incidence

• Angle of reflection