Created by StemPy LabA light-emitting diode (LED) gives out red light of wavelength . The light comes from electrons falling across the energy gap of the semiconductor. Using , the band gap of the semiconductor is closest to
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← In a Young's double-slit experiment done in air, the fringe width is 0.60 mm. The whole apparatus is now placed under water, of refractive index 4/3, with nothing else changed. In the water, the fringe width and the distance of the third bright fringe from the central bright fringe areA coin is placed on a horizontal turntable, 20 cm from its axis. The coefficient of static friction between the coin and the turntable is 0.5. The turntable is started from rest and its rate of turning is increased very slowly. Taking g = 10 m/s², the largest angular speed at which the coin stays in place, in rad/s, is ____. →
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