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9 terms

Chapter 7 Waves/rays

first part of chapter 7
STUDY
PLAY
electromagnetic spectrum
spectrum of radiation over a broadband of wavelength
gamma ray
short wave lengths, high frequencies, stopped only by pb and concrete
xray
similer to gamma but made with special equipment. pass through soft tissue to be stopped by bone
ultraviolet
sunlight that causes sunburn, mostly absorbed by ozon layer
visible light
eyes and brains interpret frequencies as light and color
infrared
given off by hot objects
microwaves
low frequency and energy waves for cooking and communicating, longest lowest wave
wavelength
lambda, distance between peaks of a wave
frequency
nu, number of waves/sec that pass a point, units Hz