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What is the wavelength of electrons having average speed


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Wavelength of Electrons

Q1: A beam of electrons (m=9.11 x 10 (-31) negative thirty first power has an average speed of 1.3 x 10^8 (eigth power) m*s (-1) s to to the negative first power. What is the wavelength of electrons having this average speed?

Q2: Assume your eyes receive a signal crossing of blue light, ^=470nm. The energy of the signal is 2.50 x 10 ^14 (negative 14) J. How many photons reach your eyes?

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