In an experiment on the photoelectric effect, monochromatic light of frequency fis shined on a cathode. To reduce the current to zero, a reverse potential difference of 3.40 V is required. What is the maximum speed of the photoelectrons that the cathode emits in this experiment? Let the charge of an electron e 1.60 x 10-19 C and the mass of an electron m = 9.11 x 10 31 kg.
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If we live in 3 dimensional space and can move in up down left right forward and backwards direction……. Then we can move in one direction in 4 Dimension why so
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