Sound and Light Waves Quiz

Which of the following is a property of sound waves?

• They require a medium to travel through

• They are not affected by temperature

• They can travel through a vacuum

• They travel at the speed of light

The major difference between both signals is that the ​ (a)   have continuous electrical signals, while ​ (b)   have non-continuous electrical signals. Analog signals have ​ (c)   because they have more values than digital signals.

• analog signals
• digital signals
• more information
• sound waves

Since the ​ (a)   on the moon emits sound and light waves to a ​ (b)   on Earth, the light waves are picked up by the receiver because ​ (c)   can travel through a vacuum. On the other hand, sound waves are created by vibrations that require a medium to travel. Thus, s​ (d)   cannot travel through a vacuum.

• transmitter
• receiver
• energy
• light waves
• sounds

When light waves pass from one medium to another and change direction, what is it called?

• Diffraction

• Reflection

• Refraction

• Absorption

Which of the following is an example of reflection of light waves?

• Bouncing of light waves off a surface

• Scattering of light waves by particles

• Refraction of light waves through a medium

• Absorption of light waves by a surface

What is the main advantage of using wireless speakers?

• Convenience and flexibility

• Better sound quality

• More affordable

• Easier to set up

In a dynamic loudspeaker, a ​ (a)   is the thin, semi-rigid membrane attached to the ​ (b)   , which moves in a magnetic gap, vibrating the diaphragm, and producing sound.

• diaphragm
• voice coil
• sound waves

In ​ (a)   , the frequency of the incoming light wave is at or near the energy levels of the electrons in the matter. The ​ (b)   will absorb the energy of the light wave and change their energy state.

• Diffraction

• absorption
• electrons

​ (a)   cause the medium to move perpendicular to the direction of the wave. ​ (b)   cause the medium to move parallel to the direction of the wave.

• Transverse waves
• Longitudinal waves
• Light waves

What technology is used in wireless speakers to transmit sound signals?

• Bluetooth

• Diaphragm

• Waves

• WiFi