Physics

Physics

Problem

When a hydrogen atom going from

n = 2

to

n = 1

emits a photon, its recoil speed is

\frac{x}{5}

m

s^{-1}

. Where

x =

\_\_\_\_\_\_\_\_. (Use: mass of hydrogen atom

= 1.6 \times 10^{-27}

kg, charge of electron

e = 1.6 \times 10^{-19}

C)

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