1. EM waves can transfer energy through vacuum.
A.yes b.no c.maybe d.notsure
2.in visible light, what color has the longest wavelength?
a.red b.blue c.yellow d.green
3.what wave length is visible to human eye?
a.infrared b.gamma ray c.visible light d.microwave
4.how fast can EM wave travel?
[tex]a.3x {10}^{2}{m/s} \: b.3x {10}^{4}m/s \: c.3x {10}^{6}m/s \: d.3x {10}^{8}m/s[/tex]
5.what wave has shortest wavelength in the electromagnetic spectrum?
A.gamma ray b.radio wave c.microwave d.ultraviolet


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