Rubidium atoms are cooled to 0.20 μK in an atom trap.

What is their de Broglie wavelength?

Thermal de Broglie Wavelength is 4.11*10-7 m

Explanation:

The thermal wavelength for a perfect quantum gas in any number of measurements and for a summed up connection between vitality and energy.

Thermal de Broglie Wavelength is generally the normal de Broglie wavelength of the gas particles in a perfect gas at the predetermined temperature

to find the thermal de Broglie Wavelength

we have the formula

Λ = h / (2∙π∙m∙K∙T) ^1/2

Putting values in the formula where h is Planck constant, m is mass of the particles which is taken as an average mass per atom of rubidium, k is Boltzmann constant, and T is the thermodynamic temperature that is given above in the question.

Λ = (6.63*10⁻34 J∙s) / (2π (1.42*10⁻25 kg) (1.38*10⁻²³ J∙K⁻¹) (

0.20uK))

= 4.11*10-7