An electron is accelerated through a potential difference of 10,000 V . Its de Broglie wavelength is (nearly): m e = 9 × 1 0 - 31 k g

Question

An electron is accelerated through a potential difference of 10,000 V . Its de Broglie wavelength is (nearly): m e = 9 × 1 0 - 31 k g, 12.2 × 10 - 13 m, 12.2 × 10 - 12 m, 12.2 × 10 - 14 m, 12.2 n m

MARKS App · Accepted Answer

The energy of electron K = 10 4 e V λ = h m v = h 2 m K = 6 . 63 × 10 - 34 2 × 9 . 1 × 10 - 31 × 10 4 × 1 . 6 × 10 - 19 ≅ 12.2 × 10 - 12 m

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