Electrons of de Broglie wavelength λ strike the target in an X-ray tube. Find the cut-off wavelength λ₀ of the emitted X-rays.
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Question

Electrons of de Broglie wavelength λ strike the target in an X-ray tube. Find the cut-off wavelength λ₀ of the emitted X-rays.

G1 Physics · Accepted Answer

Step 1: For an electron λ = h/p, so K = p²/(2m) = h²/(2mλ²). Step 2: The minimum X-ray wavelength is λ₀ = hc/K = 2mcλ²/h. Correct answer: A.