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Velocity of helium atom at 300K is 2.40 ...

Velocity of helium atom at 300K is` 2.40 xx 10^2` meter per second. What is its wavelength? (He = 4)

A

0.416 nm

B

0.83 nm

C

803 Å

D

8000 Å

Text Solution

Verified by Experts

The correct Answer is:
A
`lambda = (6.625 xx 10^(-34))/(4xx 67 xx 10^(-27) xx 2.4xx10^2)= 0.416 nm`
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