Homework 01

Homework 01 - Homework 1 2. We work from the definition of...

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Homework 1 2. We work from the definition of the frequency and the wavelength to give, for the electron, Now, the phase and group velocities are The proton is 1831 times heavier than the electron, and this affects the momentum and therefore the de Broglie wavelength as f = 100 1.6 × 10 19 6.625 × 10 34 = 2.42 × 10 16 Hz λ = 6.625 × 10 34 1.673 × 10 27 1.6 × 10 17 = 2.85 × 10 12 m and the velocities are now v ϕ = ω k = 2 π f 2 / = f = 6.91 × 10 4 m / s v gr = k m = p m = 2 E m = 1.38 × 10 5 m / s 3. We work with
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Hence, . 4. If the electron has an energy of 100 eV, then the average momentum is p = mE = 5.4 × 10 24 . The elapsed time is given as t = 2 m σ 2 = 2 m Δ x ( )
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Homework 01 - Homework 1 2. We work from the definition of...

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