Wave Behavior and Optical Lenses Quiz

What is the Doppler Effect?

• Change in wave amplitude

• Change in wave frequency due to relative motion

• Reflection of sound

• Absorption of energy

When the wave source moves toward the observer, the frequency:

• Decreases

• Increases

• Remains the same

• Doubles

The Doppler Effect applies to:

• Only sound

• Only light

• Both sound and light

• Only moving objects

What happens to wavelength in front of a moving wave source?

• Increases

• Decreases

• Disappears

• Refracts

The speed of sound in a medium:

• Changes with source motion

• Is always constant

• Depends on the observer

• Is doubled in air

What is interference in wave behavior?

• Reflection of waves

• Superposition of waves

• Refraction of waves

• Diffraction of waves

Constructive interference occurs when:

• Waves cancel out

• Waves are out of phase

• Waves add together

• There is only one wave

Destructive interference results in:

• A louder sound

• A weaker resultant wave

• A higher frequency

• No change

Beats are formed due to:

• One single frequency

• Constructive interference only

• The combination of two frequencies

• Reflection of waves

Beat frequency is the:

• Product of two frequencies

• Difference between two frequencies

• Average of two frequencies

• Sum of two frequencies