1146_Physics ProblemsTechnical Physics

1146_Physics ProblemsTechnical Physics - Chapter 40 (b)...

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Chapter 40 487 (b) Here are some sample values of the integrand, along with a sketch of the curve: xx e x 3 1 3 2 1 0000 000 0100 951 10 0200 361 10 100 0582 200 125 300 142 400 119 490 0883 4 965 0 860 × × ej .. FIG. P40.63(b) Approximating the integral by trapezoids gives A AB + ≈− = 1 15 4 870 0 250 1 4 π af . P40.64 pm v m E == = × × −− 2 2167 10 00400 160 10 27 19 . kg eV J eV bg λ == × = h mv 143 10 0143 10 m n m This is of the same order of magnitude as the spacing between atoms in a crystal so diffraction should appear. P40.65 C = h mc e and = h p : C hmc hp p e e ; Ec p m c e 22 2 2 2 =+ : p E c e =− 2 2 2 C = L N M O Q P = F H G I K J 11 1 2 2 2 2 2 2 2 2 2 E c E c E e e e e e P40.66 (a) mgy mv if = 1 2 2 vg y h mv fi = ×⋅
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