Group+3

=__17.3 Notes: Behavior of Waves__=

**//Refraction://**
Definition: The bending of a wave as it enters a new medium at an angle

Key Phrase: When a wave enters a medium at an angle, refraction occurs because one side of the wave moves more slowly than the other side

Examples: A wave breaking and crashing



//Standing Wave://
A standing wave is a wave that appears to stay in one place. It does not seem to move through medium. A standing wave forms if only half a wavelength or a multiple of half a wavelength fits exactly into the length of a vibrating cord.

Ex: Plucking a guitar



=//Diffraction//=

Definition: This is the bending of waves as it moves around an obstacle or through narrow opening.

Key Phrase: A wave will diffract more the wave length is bigger or larger compared to the opening.

Example: The sound in a theater traveling throughout from the stage to the door.

=//Interference://=

Definition: Occurs when two or more waves overlap and combine together

Constructive Interference:
Definition: Occurs when two or more waves combine to produce a wave with a larger displacement

=Destructive Interference:=

Definition: Occurs when two or more waves combine to produce a wave with a smaller displacement