Germanium is an intrinsic semiconductor with eg 0.7 ev. sketch the absorption spectrum for ge (a plot with wavelength on the x axis and % absortion on the y axis). assume that light that is less energetic than the band gap is not absorbed at all (0 % absorption) while light that is more energetic than the band gap is completely absorbed (100% absorption). you must determine and label the critical wavelength for ge (the least energetic wavelength of light that can be absorbed). a. electromagnetic radiation with a frequency of 3.091 x 1014 hz illuminates a crystal of ge. is this light absorbed by the crystal? b. electrons that have been excited to the conductance band of ge can relax to the valence band by photoemission (release of a photon of light). calculate the wavelength of light produced in this emission process. c.

the one with the highest speed

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.