Sound and Electromagnetic Waves Quiz

A reflected sound wave is known as …………..

• a repeat.

• an echo.

• a return.

• a reverberation.

A sound wave travels from point X to point Y. X Y Which diagram represents the movement of the air molecules, due to the sound wave, in the region between X and Y?

A

B

C

D

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What is the relation between the frequency and the pitch of a sound wave?

• Higher the frequency, higher the pitch

• Lower the frequency, higher the pitch

• Pitch is not dependent on the frequency.

• None of the above

Loudness of waves is measured in……………………..

• Hertz

• decibels

• Watts

• meters/second

A student holds two vibrating objects. Object A is vibrating faster than object B. Which statement is true?

• A is louder than B

• B is louder than A

• A will have a higher pitch than B

• B will have a higher pitch than A

What type of energy does a sound wave have?

• Mechanical

• Radiant

• Electrical

• Sound

The amount of energy a sound wave carries per second through a unit of area is its………………..

• Pitch

• intensity

• loudness

• frequency

The Doppler effect is produced if…………………

• The detector is in motion.

• The source is in motion.

• Both of them.

• None of them

The diagram shows a series of wave fronts approaching an opening in a barrier. Point P is located on the opposite side of the barrier. The wave fronts reach point P as a result of

• Resonance

• Refraction

• Reflection

• Diffraction

Electromagnetic wave with lowest frequency is………………..

• radio waves

• infrared

• ultraviolet

• gamma rays