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unit 3
waves
four subtopics covering the basics of waves.
written by vaibhav
3.1
general properties of waves
waves basics. types of waves. diffraction.
3.2
light
reflection. refraction. snell's law. lenses.
3.3
electromagnetic spectrum
electromagnetic spectrum. wave frequencies and colors.
3.4
sound
longitudinal waves. speed of sound. amplitude and pitch. echoes.