Physics · Solid State Physics
The interplanar separation in a crystal is d. If the incoming electrons have a momentum P = hd, where h is Planck's constant, and the momentum vector makes an angle θ with the reflecting planes, first-order constructive interference is observed at θ equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1π/6✓
- 2π/4
- 3π/8
- 4π/3
Correct answer
π/6
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