The part of the electromagnetic spectrum that has the longest wavelengths is .

RADIO WAVES

Explanation:

As we know that energy of electromagnetic waves and its wavelength is related by the formula

so here as we can see that energy is inversely depends on wavelength so for the longest wavelength the energy is least.

So here we know that least energy electromagnetic waves are Radio waves.

So the longest wavelength must be corresponding to least energy electromagnetic waves

So here correct answer for longest wavelength will be

RADIO WAVES

vapour or gas assuming atmospheriv pressure

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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