Year 9: reinforcing and canceling waves

Which of the following statements is true about reinforcing waves?

• They occur when two waves in phase combine to produce a wave with greater amplitude.
• They decrease the overall amplitude of the resulting wave.
• They occur when two waves out of phase combine to produce a wave with greater amplitude.
• Reinforcing waves only occur in rare circumstances.

What effect do canceling waves have?

• They occur when two waves out of phase combine to produce a wave with reduced or zero amplitude.
• They occur when two waves in phase combine to produce a wave with greater amplitude.
• Canceling waves only happen with sound waves.
• They increase the overall amplitude of the resulting wave.

In the context of waves, what is the name for the phenomenon where waves bend around obstacles or pass through small openings?

• Diffraction
• Convection
• Reflection
• Dispersion

How does the wavelength of a wave affect interference and reinforcement?

• When the wavelength is the same, reinforcement occurs; when the wavelengths differ, interference happens.
• Longer wavelengths always lead to reinforcement.
• Wavelength does not impact interference or reinforcement.
• Shorter wavelengths result in interference.

What happens when waves are combined in such a way that their amplitudes partly cancel each other out?

• Interference
• Diffusion
• Amplification
• Refraction

What is the term used to describe the wave interference pattern created when reinforcing and canceling waves overlap?

• Standing wave
• Rogue wave
• Surfing wave
• Tidal wave

What characterizes canceling waves?

• They occur when two waves out of phase combine to produce a wave with reduced or zero amplitude.
• Canceling waves only happen with light waves.
• They occur when two waves in phase combine to produce a wave with greater amplitude.
• They decrease the overall frequency of the resulting wave.

What is the term used to describe the phenomenon where waves perfectly align in phase to produce a wave with greater amplitude?

• Reinforcement
• Reflection
• Diffraction
• Cancellation

What happens when two waves perfectly align in phase?

• They reinforce each other, resulting in a wave with greater amplitude.
• They create a wave with lower frequency.
• They cancel each other out, resulting in no wave at all.
• They create a wave with shorter wavelength.

What is the result of constructive interference between two waves?

• Constructive interference produces a wave with greater amplitude.
• It decreases the overall energy of the waves.
• It causes the waves to cancel each other out.
• It changes the direction of wave propagation.