Calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light

2.73×10^-24

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2.42×10^-10

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242.2×10¹⁰

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None of these

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Solution

The correct option is B
2.42×10^-10

one percent of the speed of light is

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10 %

A proton and an electron are both travelling at the same speed. What can we conclude about their de Broglie wavelengths?

h = 6.63 \times 10^{- 34} J . s ., c = 3 \times 10^{8} m / s

= 9 \times 10^{- 31} k g

v_{e}, = \frac{c}{100} .

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