What is the wavelength of a proton (m = 1.67 x 10 -27 kg) moving at 1.2 x 10 5 m
ID: 962022 • Letter: W
Question
What is the wavelength of a proton (m =1.67 x 10-27 kg) moving at 1.2 x 105
ms-1? Select one: a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options What is the wavelength of a proton (m =
1.67 x 10-27 kg) moving at 1.2 x 105
ms-1? Select one: a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options What is the wavelength of a proton (m =
1.67 x 10-27 kg) moving at 1.2 x 105
ms-1? Select one: a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options What is the wavelength of a proton (m =
1.67 x 10-27 kg) moving at 1.2 x 105
ms-1? What is the wavelength of a proton (m =
1.67 x 10-27 kg) moving at 1.2 x 105
ms-1? Select one: a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options Select one: a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options a. 0.033 nm b. 3.3 x 10-6 nm c. 3.3 x 10-9 m d. 3.3 x 10-12 m e. none of the other options
Explanation / Answer
= h/p
= h/mv
= (6.626 × 10-34 Js) / [(1.67 × 10-27 kg) (1.2 x 105 m/s)
= 3.3 × 10-12 (Js / Kg m s-1)
= 3.3 × 10-12 m
(since, Joule, J = Kg m2 s-2)
Answer is (d).
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