1.VERY short waves.
2. The wavelength of light used to "see" something must be as small or smaller than the object to be seen; therefore, the smallest object that can be seen with visible light is of the order of 500 nm and molecules are much smaller than that.
3. Some insects, do indeed, see shorter wavelengths and some can see infrared, visible, and ultraviolet. Here is a site, long and detailed, that will give you some more information BUT it is long reading.
http://en.wikipedia.org/wiki/Insect
This assignment is dealing with the electromagnetic spectrum. I have some questions to ask you. 1. Which waves can be used to SEE molecules? 2. Why can't you use visible light to SEE molecules? 3. Some insects like bees can SEE light of shorter wavelengths than humans can see. What kind of radiation do you think a bee SEES?
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