If you like physics, this is a fun website

[William Gaatjes]

They explain it so easy.
I personally like everything about matter waves and is nice to do a refresh course once in a while.


http://www.thestargarden.co.uk/Matter-waves.html

What is the wavelength of a person?
De Broglie’s theory can be extended to show that all matter exhibits the same wave-particle duality as light. This means that everything in the universe can act like a wave.[8]

λ = hmv, and h=6.626×10-34 m2kg s-1.

This shows that an object’s wavelength gets smaller the more massive it is, and the faster it’s moving.

If a person has a mass of 75 kg, and is jogging at 8 km/h (which is about 2.2 m/s), then

λ = 6.626×10-347.5 × 2.2 = 4.016×10-36 m.

This is about 700 billion, billion times smaller than the classical electron radius, which is about 2.8×10-15 m.

Diffraction works best if the slit is about the same size as the wavelength, and so this explains why we do not notice wave-like behaviour in people.

De Broglie’s theory was greatly extended by German physicist Werner Heisenberg[9] (discussed in Chapter 16) and Austrian physicist Erwin Schrödinger[10] (discussed in Chapter 17) in 1925-1926. American physicists Clinton Davisson and Lester Germer proved that electrons have wave-like properties in 1927.[11] Davisson and Germer measured the wavelength of electrons by firing a beam of electrons at a nickel crystal, which acts like a diffraction grating, and then measuring the angles they were deflected by.

The wave-like nature of electrons meant that electron microscopes could be built in the 1930s.[12] The fact that electrons are more massive than photons means they have a smaller wavelength, and this is why electron microscopes have a better resolution than microscopes that use light.

I wonder what the wavelength of a black hole, neutron star or white dwarf is when seen as if it acts like a wave.

 

[William Gaatjes]

More fun stuff :

http://www.rhythmodynamics.com/Gabriel_LaFreniere/sa_electron.htm

https://www.brightstorm.com/science...um-physics/matter-wave-de-broglie-wavelength/

 

[William Gaatjes]

One more website :

https://notendur.hi.is/hj/QuantumMechanics/quantum.html

 

[zzuupp]

Cool stuff. My college physics prof used an elephant to find the wavelength for a real life object.

 

[William Gaatjes]

Cool stuff. My college physics prof used an elephant to find the wavelength for a real life object.

In the link in the first post is a confusing part of the text. The quantum coral is to my recollection not imaged with a electron microscope but a scanning tunneling microscope.
The wiki page states this but i have also read that in the original article from IBM.
https://en.wikipedia.org/wiki/Quantum_mirage

https://en.wikipedia.org/wiki/Scanning_tunneling_microscope

Besides the scanning tunneling microscope there is also the atomic force microscope.

https://simple.wikipedia.org/wiki/Atomic_force_microscope
Interesting fact that both these microscopes need a very stable basis of solid concrete and should not be setup in a location with a lot of vibrations.
If i remember correctly, there is also a very sophisticated system to prevent the vibrations from the surroundings from influencing the measurement.
One definitely does not want a freight train passing by the building while doing these experiments.

 

[Ankur Saxena]

Thanks for sharing these interesting stuff related to physics.
i love learning science

 

[William Gaatjes]

Thanks for sharing these interesting stuff related to physics.
i love learning science

If you are interested and want to go wild, you can always build your own Scanning Tunneling Microscope. ^_^
https://forums.anandtech.com/thread...croscope-by-dan-berard.2496822/#post-38678275

In this section of the forum there is a lot of interesting science material.
Give the search function a try and who knows what you will find.

 

[Ankur Saxena]

Thanks William