Prove that dσ x νφ Jas pdr
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- (2) (a) Derive the following relations ƏT = -- U ƏT 1 др = - -T Cv ƏT V ƏT (b) Using (). = -r ()- derive Poisson's equation pVV= constant. CyThe conerence lengthof on ordinary white lignt source Can be increased It we Place a culor HIter in tront ot the source, S0 thai the 11gnt that passes through filter Is somewhat mnOchroma16. Ihe minimum wave length Of the emerging lignt Is 64Fnm.wha9 is the maximum wavelengtn in order tor the conerene Tength to be 0.1060 mm? theDear expert don't Use chat gpt
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- A UV lamp used to disinfect objects emits radiation with an rms electric field strength of 65 N/C. Calculate the energy absorbed by a circular target of radius 2 cm that is placed under the lamp for 231 seconds.(Give your answer in joules but don't include the units.)Sketch a plot of the current / versus voltage V across an ideal photocell when visible light is incident on the cell. Note that the "amplitude" factor lo should be assumed to be negative.