If the De Broglie Wavelength of an Electron Is 380

question 49

Multiple Choice

If the de Broglie wavelength of an electron is 380 nm,what is the speed of this electron? (m_electron = 9.11 × 10^-31 kg,h = 6.626 × 10^-34 J ∙ s)

• A)2.0 km/s
• B)3.8 km/s
• C)1.9 km/s
• D)4.1 km/s
• E)5.2 km/s

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