Particle accelerators such as that at CERN accelerate particles to high speeds before colliding them and measuring the particles given off.  However it is almost always protons that are collided, or ions or neutrons. Why doesn't anyone ever collide electrons?  Even if you did collide electrons, what sort of things would you see given off?

EDIT:

thanks for the answer, i'm also interested in what sort of particles are formed from electron collisions and how much energy is needed to form these particles.

The mail.

Mechanical 78 RPM phonograph records.

Engines, gas, diesel, turbine, steam.

Motion pictures, silent.

The power grid.

Nuclear plants.

Image - wikipedia

How do anti-static sprays work? Where do the electrons go to or come from to neutralise a charged surface?

John Chapman, Perth, Western Australia

I was wondering about the plausibility of a "joke theory" I saw in an online web comic (www.qwantz.com not sure where it is anymore though). Essentially it suggested that all electrons are the same electron except it just travels through time - explaining their being identical.

Originally I almost dismissed the idea pretty quickly. However, since reading the most recent New Scientist in which the main article said that quantum particles such as electrons and photons have no place on the arrow of time (or something like that). It seems that this theory is more plausible if not just for me.

At least in the case that the electron has "failed to kill itself" (/will fail to kill itself / is currently failing to kill itself).

Thanks for your views and help in advance!

With planning and construction of semi-permanent moon bases and similar for Mars, infrastructure will have already been considered, including electrics. Have the engineers pondered this question too? And have they decided on a solution.

If you have a current going through a fluorescent bulb tube and you smash it, for a split second there is a yellow flash as the gas escapes. What I'm wondering is what causes the yellow flash if the light coming out originally is a mix of colours that make white light?

I'm sure the answer to this will be yes, but is there any experiment or astronomical observation that proves it?  For example, could I weigh a wire,  then weigh it again when a current is passing through it and see a difference?

I am exploring the properties of waves when traveling thorough a transparent medium. I observed that when white light is shone through a prism the blue light refracts more than the red light in the spectrum. This is due to the interaction between the blue light and the molecules within that medium. 

I wish to know if anyone can give me more details the nature of this interaction.

A more through explanation as to why wavelength of the light effects the speed through a medium would be appreciated and any relevant laws or theories as this is a mystery to me.

Does anybody know what the electronic component shown in the pictures might do?

It was part of a 1930s collection given to me by John Harwood, a watchmaker from Dunster, Somerset, UK. Harwood inherited the collection from his father-in-law, Herbert Stacey, who was an electrical technician.

Joop van Montfoort, By email, no address supplied