Quiz on Light: Wave and Particle Properties

What is light?

• Electromagnetic radiation detectable by the human eye

• A type of sound wave

• A form of heat energy

• A solid object

What is the speed of light in a vacuum?

• 3.0 x 10⁸ m/s

• 2.0 x 10⁸ m/s

• 2.998 x 10⁸ m/s

• 1.5 x 10⁸ m/s

What is the first law of reflection?

• Light bends when passing through different media

• Incident ray, reflected ray, and normal all lie in the same plane

• Angle of incidence equals angle of refraction

• Light travels in curved paths

What causes refraction?

• Change in speed of light

• Change in brightness

• Change in temperature

• Change in color

What does Snell's law relate to?

• The speed of sound

• The color of light

• The bending of light

• The intensity of light

What is a photon?

• A solid particle

• The smallest unit of light

• A form of heat energy

• A type of sound wave

What happens to light when it enters a denser medium?

• It disappears

• It changes color

• It slows down and bends

• It speeds up

Which color of light has the highest frequency?

• Red

• Green

• Blue

• Violet

What is the purpose of using red light in dark rooms?

• It is brighter than other colors

• It has a higher frequency

• It helps in color correction

• It doesn't damage light-sensitive materials

What is the refractive index of crown glass?

• 1.0 to 1.2

• 1.48 to 1.96

• 2.0 to 2.5

• 1.5 to 1.8