Hi Mr Doner, As I practice past paper questions on this topic, I found the mark scheme said "de Broglie wavelength increases as the speed of the particle increases". I am confused because I think λ=h/mv. So λ should decreases if v increases. Can you tell whether the mark scheme is wrong or not? Thank you!
If I think about it, in the movie Ant Man; Ant Man should have observed the wave properties of matter on himself when he had shrinked. Obviously Marvel doesn't employ Quantum Physicist.
phew I was really worried I might diffract when i walk through my door.
in the last 2 years i have never been this interested in physics. Thank you so much. You've saved me.
man....chris you really be out here saving lives. Thank you so much.
Hi, our class loves you and you are our senpai. Much love.
Thank you! What school are you at?
Hello Mr. Doner, I had a doubt,
When we are substituting the value for energy, why do we use E=mc^2, as opposed to E^2=m^2c^4+p^2c^2 ?
considering the fact that the particle in question is in motion, thus possessing momentum?
That wasn't a proof, it was a justification for a guess at what the wavelength might be. It turns out to be correct as verified experimentally.
Hi Chris, how come the diffraction pattern for electrons has a bright intense spot in the centre while the one for x-rays does not?
I would imagine it is because of the ratio of wavelength to slit width or separation, rather than, whether it is electrons or electromagnetic waves.
Hi Mr Doner,
As I practice past paper questions on this topic, I found the mark scheme said "de Broglie wavelength increases as the speed of the particle increases". I am confused because I think λ=h/mv. So λ should decreases if v increases. Can you tell whether the mark scheme is wrong or not? Thank you!
You are right, but I don't see in the syllabus where is says that.
Hello Chris. Love the videos. Just wanted to ask. If I watched your videos and solved past papers, would that be enough prep?
It is a very good way to review, however, I find studying very individual. Some students need to take more time organizing the course material.
@@donerphysics Alright thanks! I'm in M21 btw
Great video overall. I have a doubt. How can we use E=mc^2 when the particle in question is not moving at the speed of light?
I am unsure of what you are asking. E=mc^2 is used for particles at rest.
Relativistic energy is mc^2. Anything moving possesses relativistic energy.
Nice video!
Legendary vids
If I think about it, in the movie Ant Man; Ant Man should have observed the wave properties of matter on himself when he had shrinked. Obviously Marvel doesn't employ Quantum Physicist.
Great