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How do waves interact?

How do waves interact?. Reflection. Reflection: Happens when a wave bounces back after hitting a barrier. How we see light! The object reflects light of the color seen Sound, light, and water waves can all be reflected: Sound: Echo

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How do waves interact?

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  1. How do waves interact?

  2. Reflection • Reflection: Happens when a wave bounces back after hitting a barrier. • How we see light! The object reflects light of the color seen • Sound, light, and water waves can all be reflected: • Sound: Echo • Light: How we see the planets and Moon. The planets reflect the light of the sun.

  3. Absorption and Scattering • Absorption: The transfer of light energy of particles of matter. • Scattering: An interaction of light with matter that causes light to change its energy, direction of motion, or both • Picture on 646

  4. Refraction • Refraction: The bending of a wave as the wave passes between two substances in which the speed of the wave differs. • Moves from one medium to another. The wave speed changes, therefore the wavelength changes. • Rainbows: Occur because sunlight is refracted through water droplets. The colors occur because the different colors in sunlight is refracted by different amounts, and spread out into different colors.

  5. Diffraction • Diffraction: A change in the direction of a wave when the waves finds an obstacle, edge, such as an opening. • Light: Long wavelengths, don’t diffract very much. • Sound: Shot wavelengths, easily diffracted.

  6. Interference • Interference: The result of two or more waves overlapping. • Constructive: When the crest or troughs of two waves overlap and creates a bigger wave, with a larger amplitude. • Destructive: Crest of one wave and the trough of another wave overlap. This results in no wave at all.

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