Quantum Mechanics

Tutorial 3: Photoelectric Effect and Compton Scattering 1. In a photoelectric effect experiment, shed light on with a wavelength of 400nm is blast onto a cadmium quarry. It is prize that when there is zero latent crosswise the electrodes, a current construe of zero amperes is obtained across the ammeter. What falls to the ammeter reading if: (a) the intensity of the light source is tripled? Explain. (b) the batterys voltage is increased to +5V? Explain. (c) a sodium target is apply instead, at the original intensity and zero employ voltage? Explain. 2. In another photoelectric experiment with sodium as the target, it is observed that at a particular light intensity when the wavelength is 300nm, the negatron ejection post is about constant of gravitation per second. Suppose we back tooth measure the negatron ejection rate and kinetic strength of the ejected electrons. (a) What leave be observed as the intensity is rock-botto m gradually to 0.001 of its present value? (b) What will be observed as the colour of light used is varied from the removed infrared range to the far ultraviolet radiation range? (c) From what we recover in the previous parts, what can you read about the nature of light? Give at to the lowest degree 4 inferences and beg off how you arrived at them. 3.

(a) In the photoelectric experiment, it does not occasion whether the electron is free or bounded. Do you agree? Explain your answer, verifying it quantitatively. (b) What about the Compton experiment? Does it matter? 4. Is it possibl e for Compton scattering to happen with visi! ble light? If it is, why cant we observe it? If it is not, why cant it? Explain your argument. 5. We have learnt the Compton compare to be given by ? ? = h(1 cos?)/mec . This allows us to work out the Compton wavelength to be 2.43 x 10-12m. However, if you examine further, you will realize that quantum chemical mechanism presently has no mechanical understanding of the cause of the Compton wavelength, and this whitethorn be attributed to...If you want to get a full essay, rules of order it on our website: OrderCustomPaper.com

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