AS and A-Level physics resources thread

Hi wilko... is there any chance you can upload the jan 2011 paper please, i can't seem to find it anywere XD thanks

does anyone know any websites that have edexcel unit 1 physics past papers on mechanics and matericals... PLEASE?? thankyou

hey guys I have the g482 ocr physics jan 2011 paper....



there is a question at the end...which i cnt do, wondering if any1 could help


8c) in space, a beam of photons of different energies passes throgh a cloud of atomic hydrogen gas. explain, with reasons,, what is likely to happen to photons of energy 19.38*10-19 and to osme of the hydrogen atoms?



thanks in advance guys....

needing help on de broglie, as in ive never done it. anyone care to help me?

Hi everyone

Could someone say me where i could find the mark scheme of the Physics AS Edexcel unit 2 exam paper of the day 21 May 2009 ? It´s paper reference iS 6PH02/01 . Please help me

PS : I found the exam paper here , but i cant find the mark scheme ...

The photoelectric effet shows that light can be regarded as made up of particles (photons), despite all that double slit / polarisation / modulation stuff that shows that it can be regarded as a wave.

De Broglie suggested that the same happens in reverse - things we are happy to think of as particles can also be thought of as waves. The de Broglie equation tells you the wavelength $\lambda$ of a piece of matter with mass $m$ and velocity $v$, $\lambda=\frac{h}{mv}$, where $h$ is Planck's Constant.

So, the wavelength of matter depends on its mass and how fast it is moving. The reason we don't see people behaving like waves, for example, diffracting when they walk through doors, is that the wavelength of a person walking at one metre per second is very, very small (work it out!) and is not of the same order of magnitue as the width of the doorway.

In an exam; you will be expected to apply the above equation. You may also need to combine it with the transfer equation, $eV = \frac{1}{2}mv^2$, which lets you calculate the velocity of an electron accelerated from rest by a potential difference of $V$ volts.