- #1
ognik
- 643
- 2
Homework Statement
To what velocity would an electron (neutron) have to be slowed down, if its wavelength
is to be I meter? Are matter waves of macroscopic dimensions a real possibility?
2. Homework Equations
I have assumed this could apply to pretty much any free particle of mass m, and is an introductory question only in nature.
3. The Attempt at a Solution
I have added the units below
I took ##p=\frac{h}{\lambda}##, with ##\lambda=1m##, so that in general for particles, ##v = \frac{h}{m} = \frac{6.626 \times 10^{-34} J.s} {1m \times 9.1 \times 10^{-31}kg} = 7.28 \times 10^{-4} m.s^{-2}##?
For the 2nd part of the question, it seems to me that the velocity is unrealistically slow for a free particle, and would be more so for those with higher mass. I find the 2nd part of the question a little ambiguous, but assuming they are referring to wavelengths of the order of 1m, it would seem from this that waves of macroscopic dimensions are unlikely?
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