Wave Interactions

Reflection Refraction Diffraction Interference

1. Reflection: wave bounces back after striking a barrier When a wave hits a reflecting surface, it is reflected outwards at the same angle as it came in.

1. Reflection Reflected light beam Incident light beam Mirror

1. Reflection

2. Refraction: bending of a wave as it passes at an angle from one medium to another

2. Refraction

2. Refraction:

2. Refraction Different wavelengths bend at different angles, which is what makes a prism able to separate white light into all its colors Refracted Colors Air White Light Glass Prism

2. Refraction Refraction is also what makes lenses work. Light bends when it goes from air to glass. Air Incoming light Focused light Lens

3. Diffraction bending of waves around a barrier or through an opening

3. Diffraction

4. Interference result of two or more waves overlapping When two waves run into one another they: ADD if 2 crests or 2 troughs overlap SUBTRACT if the crests and troughs overlap

4. Interference