Refraction, Reflection and Diffraction

What would you call this?

• Reflection

• Diffraction

• Refraction

• Friction

What is the main difference between refraction and diffraction?

• refraction is a phenomenon that affects light; diffraction is a phenomenon that affects sound
• refraction involves the bending of light; diffraction involves the bending and spreading of light, usually around an obstacle

What happens to the frequency of a wave as it passes through a gap？

• Increases

• Decreases

• No change

• None of above

When the crest of one wave passes through the trough of another wave, ______ takes place.

• resonance
• diffraction
• destructive interference
• constructive interference

A wave of constant wavelength diffracts as it passes through an opening in a barrier. As the size of the opening is increased, the diffraction effects

• decrease

• increase

• remain the same

This image best depicts which of the following wave behaviors?

• Reflection

• Refraction

• Diffraction

• Resonance

Definition: the change in direction of a wave passing from one medium to another

• Reflection

• Refraction

• Diffraction

• Polarization

Which of the following is the best example of diffraction?

• Your voice echoing back when you shout into a canyon

• A straw appearing to bend when you place it in a glass of water

• A prism breaking a beam of light into its component colors

• The music on your stereo getting louder when you turn up the volume

Does the wave speed change after diffraction？Explain it.

• Yes. It slows down.

• Yes. It speeds up.

• No. There is nothing change about the medium.

• No. Because the frequency doesn't change.

In ________ interference, the energy of the combined wave is greater than the energy of each of the two waves.

• destructive
• rarefaction
• resonance
• constructive