Light and Sound

Which travels faster, light or sound?

• Light

• Sound

Fill in the blank: The speed of light is ______ km/s.

• 299,792 km/s

• 150,000 km/s

• 300,000 km/s

• 250,000 km/s

Shadows are formed when an object blocks the path of ____.

• light

• sound

• water

• air

What is refraction?

• The bending of light as it passes from one medium to another

• The reflection of light off a surface

• The scattering of light in different directions

• The absorption of light by a material

Refraction is responsible for making swimming pools look ______ than they really are.

• shallower

• deeper

• wider

• narrower

When light bounces off a smooth surface, it is called:

• Refraction

• Diffusion

• Reflection

• Absorption

Absorption in terms of light is:

• the process by which light is taken in by a material and not reflected or transmitted.

• the bending of light as it passes through a medium.

• the splitting of light into its component colors.

• the reflection of light off a surface.

The process is called when light passes straight through something like a piece of transparent paper.

• Reflection

• Refraction

• Diffusion

• Transmission

The splitting of white light into a spectrum is called:

• Diffraction

• Reflection

• Refraction

• Dispersion

Optical fibers are used for ______ in communications.

• transmitting data over long distances

• decorative lighting

• short-range wireless communication

• power transmission