Light Energy, waves that travel in a straight line, crest, highest point on a wave, trough, lowest point on a wave, amplitude, height, distance from the midpoint, wavelength, distance between a point on one wave and the same point on the next wave, photon, tiny bundle of energy that travel through space, frequency, the number of waves that pass a point in a given amount of time, transverse wave, moves at right angles to the direction the wave travels, the higher the amplitude...., ...the more energy the wave has, as wavelength increases..., ...frequency decreases, opaque, NO LIGHT can pass through ~ door, book, translucent, SOME light can pass through ~ frosted glass, stained glass, transparent, ALL light can pass through ~ window

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