Question
Please complete parts a and b
We take it as granted that solid objects of condensed matter comprise huge numbers of atoms. When sufficiently heated, such objects can emit visible radiation as a collective effect, somehow of the atoms in the solid state of matter. This sort of radiation is called incandescence. Anyone show has ever used an old style flashlight has used this sort of light. Light from the glowing embers of a campfire is another more rare, since they are very energy inefficient - the amount of visible light as a fraction of the entire spectrum of electromagnetic radiation emitted by incandescently glowing bodies is quite small. For hot light bulb filaments it is only 5-7%. However , it is interesting to compare incandescent sources with light arising from individual atoms in the gas phase. There are low-pressure gas tubes that we can use to help us with the comparison, tubes through which energetic electrons can be made to pass by virtue of an electrical discharge so as to make the individual atoms glow. A grating spectrometer can then be used to examine to glow. What is a diffraction grating? Estimate the angles at which one will find principal maxima in transmission for monochromatic green light normally incident on a transmission grating of 500 lines per mm. Make appropriate assumptions!
Explanation / Answer
a.) Diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions
