1 You need to have a valid Provisional Driving Licence before you can drive on the UK roads. 2  To obtain a Driving Licence you need to complete a D10 form. 3  You you can obtain a D10 form from any Post Office or follow the link below.4  You need to be able to read a number plate at a distance of 20 metres. If you need glasses or contact lenses you MUST where them when driving. 2  It is not essential to pass your Theory Test first, this can be studied during your lessons. 3  PC CDROM's, DVD's, Books and Highway Codes are available in my Online Shop. 4  You need to enjoy your lessons, the more enjoyable, the more you will learn.
Alpha particle. Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways. Alpha particles are named after the first letter in the Greek alphabet, Î±.
We're not going to go into details about the exact origins of alpha, beta and gamma radiation in this lesson. Animation giving an idea of the relative size and speed of alpha, beta and gamma radiation. For the moment we'll say that alpha and beta radiation consist of tiny particles, much smaller than an atom. They move incredibly fast, perhaps thousands of kilometres per second. Gamma radiation is a sort of invisible, very high-energy light. Alpha, beta and gamma are the first three letters of the Greek alphabet. The types of radiation are named in the order that they were discovered.