Learning Targets

Students can describe how waves interact.

Students can compare and contrast constructive/destrictive interference.

This picture shows what constructive and destructive interfences are. It shows that two constructive interferences make one great wave. Also it shows thath two destrictive interferences make a flat wave or even and make a negative wave.

Vocabulary

Reflection-the throwing back by a body or surface of light, heat, or sound without absorbing it.

Diffraction-is defined as the bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle

Refraction-is the bending of a wave when it enters a medium where its speed is different

Interference-the combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or canceled

Constructive-the interference of two or more waves of equal frequency and phase, resulting in their mutual reinforcement and producing a single amplitude equal to the sum of the amplitudes of the individual waves

Destructive-the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other

Standing Wave-is a wave in a medium in which each point on the axis of the wave has an associated constant amplitude

This video shows what refelction, refraction, and diffraction are. also it shows examples and explains them. It also tells what they are.

EXPLORE THE UNKNOWN

Questions

Compare and contrast destructive and constructive interference - Constructive waves make greater waves and destrictive waves make a lower wave or cancel each other out. They both are interferces with waves.

What is an example of reflection? How does your example demonstrate reflection - An example would be shinning a light at a glass. It demonstrates it because reflection is the light bouncing back instead of obsorbing it.

What is an example of refraction? How does your example demonstrate refraction - An example would be a somone yelling into water from a hill. It demonstrates it because refraction is when sound waves pass from one medium into another.

What is an example of diffraction? How does your example demonstrate diffraction - The closely spaced tracks on a CD or DVD act as a diffraction grating to form the familiar rainbow pattern seen when looking at a disk. It demonstrates it because diffraction is the bending of light.

Provide an example of a standing wave and explain how it occurs - vibration of a violin string. The harmony it forms