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first part of chapter 7

electromagnetic spectrum

spectrum of radiation over a broadband of wavelength

gamma ray

short wave lengths, high frequencies, stopped only by pb and concrete


similer to gamma but made with special equipment. pass through soft tissue to be stopped by bone


sunlight that causes sunburn, mostly absorbed by ozon layer

visible light

eyes and brains interpret frequencies as light and color


given off by hot objects


low frequency and energy waves for cooking and communicating, longest lowest wave


lambda, distance between peaks of a wave


nu, number of waves/sec that pass a point, units Hz

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