Recent content by Deathnote777

The wave will diffract

I don't really understand your question exactly. If I am a bit of the water and am passing through the slit, I will be diffracted, move away from the central line after passing through the slit

As far as I know, wavelength in deeper region will be longer. My teacher told me that the degree of diffraction will increase with the wavelength of waves. However, I don't know what will happen when making only 1 side deeper while another side remains unchanged.

Homework Statement Suppose a water wave is moving from left to right in a water tank. The water tank is divided to two region (left and right) by an one-slit plastic plate. Which of the following(s) adjustment can increase the degree of diffraction of the wave ? (1) Make the water of the...

How about Isn't fλ the group velocity broglie wavelength has same value as wavelength, right ? Is it true that particle has only broglie wavelength but not wavelength ? And is there phase velocity in quantum physics ? Isn't it only exist in classical one ? How can we calculate the...

Thanks, that means light is a special case in which phase velocity = individual one

I don't know much actually. But fλ is not the individual speed of photon, isn't it ? fλ should be the phase velocity, is it right ?

Thanks. Now, consider a photon. λ=h/p. fλ = E/p. What should fλ be ? My book says it is c. But why ? Isn't fλ the group velocity broglie wavelength has same value as wavelength, right ? Is it true that particle has only broglie wavelength but not wavelength ? And is there phase velocity in...

Homework Statement 1. fh stands for energy of a particle. But what is included in the energy ? K.E. of the particle only ? 1.1. If fh is the K.E only, then I have a question. λ=h/p --> fλ=fh/mv --> mv^2 = fh. It is strange that fh = mv^2 but not 1/2 mv^2. 2. Is broglie wavelength equivalent to...

I think I am confused here. Why the potential of a plate will not change when the charge density has increased ? Assume there is one plate only. To my knowledge, increase in charge density in the plate will increase the force exerted on a charged object next to the plate. Hence, potential of...

parallel plane -- electric field and potential Homework Statement Consider 2 plate A and B. They are connected with a battery and their distance is halved. What will happen as a whole ? Homework Equations The Attempt at a Solution 1. Charge per unit area increase due to increase in electric...

Thank you

X-ray question -- frequencies and energies Homework Statement 1. Why does x-ray with higher frequency possesses higher ionizing power and penetrating power ? 2. Will gamma ray with higher frequency possesses higher ionizing power and penetrating power ? And is "gamma ray has no mass" a reason...

PIC (A) http://imageshack.us/a/img37/941/img20130104192537.th.jpg PIC (B) http://imageshack.us/a/img23/5496/img20130104192554.th.jpg I hope you can ans it in a simple way as I am just a secondary 6 student :) thx! For pic a, 1. I dun understand why interference occurs when there is 1 slit...

Thx. I think I get it. I shouldn't consider only the time interval when molecules are colliding with the wall. Right ? Then what's about the assumption "the time during each molecules colliding with the wall of the container is negligible compared with the time elapsed between successive...