Interference Patterns

Mr. Andersen explains interference patterns, which occur when two or more wave fronts interact. He describes how interference patterns can be formed, using examples like sound, water, and light waves. The video covers wave diffraction and the double-slit experiment, demonstrating how light behaves when passing through slits. A PhET simulation is used to show light measurement and interference patterns, highlighting areas of constructive and destructive interference.

What happens when two wave fronts interact destructively?

• They change direction.

• They amplify each other.

• They cancel each other out.

• They create a new wave.

What is a key characteristic of wave diffraction?

• Waves increase in speed.

• Waves bend around a gap.

• Waves pass through a medium.

• Waves change color.

In the double-slit experiment, what results from constructive interference?

• A change in frequency.

• A new wave pattern.

• A bright band.

• A dark band.

What is observed on the screen when light passes through a single slit?

• Uniform brightness.

• A single bright spot.

• Alternating dark and bright bands.

• Complete darkness.

What does the PhET simulation demonstrate about light passing through two slits?

• Light creates a uniform pattern.

• Light travels in a straight line.

• Light forms interference patterns.

• Light changes color.