I suppose you mean the visible spectrum, only a small part of the entire electromagnetic spectrum. The visible spectrum is basically all of the colors the human eye can detect.
incandescent bulb is equivalent to white light, i.e it has all the seven wavelengths of light. therefore when passed through a prism it is disperses into all the seven wavelengths WITHOUT ANY SPACES...
They are related by they are both spectrums that give the color(s) that the element is. The Emission Spectrum shows what color(s) it gives off, and the Absortion shows what color it absorbs and...
It's a line spectrum because of the quantization of energy- meaning you only see energy with levels n=1,2,3.... One would never see the energy level n=2.8 for instance- that would be the case if it...
Because the light we see given off by the moon - is actually the reflection of sunlight. Therefore they will have the same spectrum. The moon does not generate its own light.