A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1 . 878 × 10 – 4 . The mass of the particle is close to :

Question

A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1 . 878 × 10 – 4 . The mass of the particle is close to :, 4 . 8 × 10 - 27 kg, 9 . 1 × 10 - 31 kg, 1 . 2 × 10 - 28 kg, 9 . 7 × 10 - 28 kg

MARKS App · Accepted Answer

λ = h mv ⇒ m ' m = v λ v ' λ ' = 1 5 × 1 1 . 878 × 10 - 4 × 9 . 1 × 10 - 31 m ' = 9 . 7 × 10 - 28 kg

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