Diffraction of Waves

Wave Behavior 2: Diffraction and Interference

by Ms Taylor

Multiple Choice

Which of the figures represents reflection?

• A
• B
• C
• D

Multiple Choice

Which wave behavior shown represents refraction?

• A.

• B.

• C.

• D.

​so, Diffraction is Larger

​So, Diffraction is less.

Multiple Choice

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

Multiple Choice

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

Multiple Choice

witch picture is diffraction

• ​Both waves are going in opposite directions with crests aligned on same side.

​

• Where they meet, their energy combines to produced a wave with a larger crest (they build each other up)

​

• The wave continue moving in the direction they were going before.

• ​​Both waves are going in opposite directions with crests on opposite side.

​

• Where they meet, their energy combines to cancel each other, producing a flat line (they tear each other down)

​

• The wave continue moving in the direction they were going before.

Multiple Choice

What type of interference is represented in this diagram?

• Constructive

• Destructive

Multiple Choice

What will be the result after these two waves overlap?

• A taller wave

• A shorter wave

• A wave with no amplitude

• 3 waves

Multiple Choice

You're in your room blasting music with the door shut, your mom opens your door. Now your music is heard throughout your home. This is an example of _______

• interference

• diffraction

• reflection

Multiple Choice

Look at the diagram. At which positions will the overlapping waves have the most constructive interference?

• Positions #1 & #5

• Positions #2 & #3

• Positions #3 & #4

• Positions #4 & #5

Multiple Choice

What type of wave behavior is pictured above?

• Refraction
• Reflection
• Absorption
• Diffraction

Multiple Choice

What type of wave behavior is pictured above?

• Refraction
• Reflection
• Absorption
• Diffraction

Multiple Choice

If the man throws the spear at the image, then he will miss the fish. This is because the water bends the light. What is this an example of?

• Reflection

• Refraction

• Diffraction

Multiple Choice

What are echos an example of?

• Reflection

• Refraction

• Diffraction

Multiple Choice

Look at the picture. What property allows Jack to hear Jill on the other side of the door?

• Reflection

• Refraction

• Diffraction

Multiple Choice

The picture shows a prism. What property of waves causes the light to look like a rainbow as it exits the prism?

• Reflection

• Refraction

• Diffraction

Multiple Choice

According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction
• moves into the mirror at a slightly different angle
• bounces off the mirror toward the direction it came from
• bounces off the mirror at the same angle it hits.