Sound and Light

A decibel is a device used to study sound waves

• True
• False

Which of the following effects is caused by increasing amplitude?

• wavelength increases
• decibel measure increases
• frequency increases
• decibel measure decreases

Which of these will still be effected if the energy of a sound wave is increased

• intensity
  i
• pitch
• frequency
• amplitude

If the same string was strummed to vibrate at a greater height, the sound would be louder.

• True
• False

Sound is a mechanical wave, which means it must travel through

• vacuum
• empty space
• matter
• radiation

What will two crests on a wave do if frequency is decreased?

• move lower
• move higher
• move farther apart
• move closer together

The electromagnetic spectrum includes --

• microwaves and ultraviolet light
• sound waves and ocean waves
• earthquake waves and tsunamis

The energy released from the sun is in the form of --

• helium sound waves
• mechanical energy
• electromagnetic radiation
• seismic chemical energy

Which of these has the largest wavelengths and the lowest energy within the electromagnetic spectrum?

• radio waves
• infrared light
• gamma waves
• visible light

Which is a true statement?

• Radio waves are not a type of electromagnetic radiation
• Light waves are a type of electromagnetic radiation
• All types of electromagnetic radiation can be seen
• No types of electromagnetic radiation can be seen