Quiz on Light and Optics | science 8

What is light considered as?

• Liquid

• Gas

• Energy

• Matter

Light travels in straight lines called:

• Beams

• Rays

• Waves

• Streams

Which part of the electromagnetic spectrum can the human eye see?

• Radio waves

• Infrared

• Visible spectrum

• Gamma rays

Match the following terms with their correct type of energy.

• Light from the sun

• Kinetic energy

• Heat produced by a fire

• Electromagnetic radiation

• Energy released in a nuclear reactor

• Thermal energy

• Energy of a moving car

• Nuclear energy

What is the speed of light in a vacuum?

• 150,000 km/s

• 450,000 km/s

• 600,000 km/s

• 300,000 km/s

How long does it take for light from the Sun to reach Earth?

• 16 minutes

• 12 minutes

• 4 minutes

• 8 minutes

Which of the following correctly describes the behavior of light?

• It travels in curved paths

• It stops when it hits an object

• It always travels in straight lines

• It speeds up when it enters a denser material

What is refraction?

• The bouncing of light off a surface

• The bending of light when it passes through a different medium

• The absorption of light by an object

• The splitting of light into different colors

When light passes from air to water, its speed:

• Increases

• Decreases

• Stays the same

• Doubles

What happens to light when it passes through a convex lens?

• It spreads out

• It converges to a focal point

• It stops moving

• It is absorbed completely