1) Which of the following has the longest wavelength? a) Radio wave b) Microwave c) Infrared d) X ray 2) Which electromagnetic wave has the shortest wavelength and highest frequency? a) Radio wave b) Gamma ray c) Infrared d) Ultraviolet 3) Which of the following examples of EM waves arranged correctly? a) Radiowave, Infrared, Ultraviolet b) Gamma ray, Visible light, Xray c) Xray, Gamma ray, Radiowave d) Gamma ray, Ultraviolet, Xray 4) What is an electromagnetic wave that can be seen by our eyes? a) Infrared b) Microwave c) Radiowave d) Visible light 5) Which of the following has frequencies higher than ultraviolet rays? a) Visible light b) Infrared c) X rays d) Radiowave 6) Astronomers often scan the sky using devices called radio telescopes. What can you conclude about these devices? a) They send radio broadcasts out to distant stars and planets b) They are less powerful than optical telescopes c) They pick up the radio waves emitted by stars d) They can detect ultraviolet radiation 7) Which word correctly describes gamma rays? a) weak b) visible c) destructive d) harmless 8) What do all forms of electromagnetic radiation have in common? a) their strength b) their speed c) their wavelength d) their frequency

(Electromagnetic Spectrum)

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