Modern Physics For Scientists And Engineers - 4 Edition - Chapter 4 - Problem 30
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Light from a Nd: Yag laser with a wavelength of 397nm is incident upon a hydrogen atom

Modern Physics for Scientists and Engineers | 4th Edition

Problem 30

Light from a Nd: Yag laser with a wavelength of 397nm is incident upon a hydrogen atom in the n 2state at rest. What is the highest state to which hydrogencan be excited?

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Physics 222 2/05/19 Electric Current  Currents: consider a conducting wire of cross­sectional area A having n free charge­ carrying particles per unit volume with each particle having a charge q with particle moving at drift speed v d o Current is the motion of any charge, positive or negative, from one point to another. o Current direction is along (opposite to) the motion of the positive (negative) charges. o Current is defined to be the amount of charge that passes a given area in a given amount of time o Current has units of Ampere = 1 Coulomb/1 sec o When electrons move from small­diameter to large

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