1) Hpow many waves are in the electromagnetic spectrum a) 9 b) 7 c) 5 2) All electromagnetic waves are a) longitudinal b) low frequency c) transverse 3) What type of wave is emmited by hot objects a) gamma b) infra red c) visiable light 4) What is the lowest frequency wave a) gamma b) radio c) microwave 5) Which electromagnetic wave is reflected by the earths atmosphere a) radio b) ultra violet c) microwave 6) Which electromagnetic wave is used in night vision a) infra red b) visiable light c) x rays 7) Which of these is not a property of ALL the electromagnetic waves a) travel at the speed of light in a vaccume b) All penetrate living tissues c) all are transverse waves 8) The most penetrating wave is a) radio b) x ray c) gamma 9) Type of ionising wave is a) visiable light b) ultra violet c) x ray 10) Which is used as protection from x rays a) sliver b) lead c) gold 11) Which is not true about gamma rays a) they have the shotest wavelength b) they are ionising waves c) they cannot cause cancer 12) Which radiation is used by snakes to find food a) x rays b) infrared c) visiable light 13) Which is not true about about visiable light a) it can cause cancer b) lasers are this c) it travles in straight lines 14) wave length is related to frequency a) true b) false c) not always 15) Who discovered the electromagtic spectrum a) darwin b) herschel c) lister

electromagnetic quiz

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