Physics, 09.10.2019 05:20 djjdjdjdjdNfnd1941
Light from a he-ne laser (wavelength 632.8 nm) falls on a photo-emissive cell with a quantumefficiency of 10-4(the number of electrons emitted per incident photon). if the laser power is 2 mw, and all liberated electrons reach the anode, how large is the current? could you estimate the work function of the cathode material by varying the anodevoltage of the photocell?
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8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )
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Physics, 22.06.2019 04:10
Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s
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On average 8 bananas make up one pound. the price is four pounds for 5.00. you must buy 25 bananas.what is your cost?
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Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?
Answers: 1
Light from a he-ne laser (wavelength 632.8 nm) falls on a photo-emissive cell with a quantumefficien...
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