Units of the Thermal de Broglie wavelength?

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SUMMARY

The discussion centers on the units of the Thermal de Broglie wavelength, represented by the formula λ = h / (2πmkT)^(0.5). Participants clarify that while dimensional analysis yields a quantity with a fractional exponent (S (J/kg)^(0.5)), the final unit must be expressed in meters, as it represents a wavelength. The conversation emphasizes the importance of converting Joules into base units of kilograms, meters, and seconds to confirm the dimensional consistency.

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  • Understanding of the Thermal de Broglie wavelength concept
  • Familiarity with dimensional analysis
  • Knowledge of the relationship between energy units (Joules) and base units (kg, m, s)
  • Basic grasp of quantum mechanics terminology
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  • Research the derivation of the Thermal de Broglie wavelength formula
  • Learn about dimensional analysis techniques in physics
  • Study the conversion of energy units, specifically Joules to kg, m, and s
  • Explore the implications of fractional dimensions in physical quantities
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Students and professionals in physics, particularly those studying quantum mechanics and thermodynamics, will benefit from this discussion on the Thermal de Broglie wavelength and its dimensional analysis.

rwooduk
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1. Units of the Thermal de Broglie wavelength?
2. λ = h / (2*pi*mkT)^(.5)
3. through dimensional analysis i get S (J / kg)^.5

can you even have .5 of a unit?
 
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Yes, you can have a quantity that has a dimension with a fractional exponent.

However, here, you want to end up with just a unit of length.

Try expressing a Joule in terms of kg, m, and s.
 
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Thank you will try that!

and yes its a wavelength so should simply be in meters, what was i thinking, lol

will do the dimensional to confirm anyway, thanks!
 

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