what material is used for absorption.

There are three types of radiation; they are Alpha, Beta and Gamma. Gamma radiation has two types of radiation, nuclear which is dangerous and electromagnetic which is not dangerous.

Gamma rays are the opposite of alpha particles in a way. They penetrate a long way into materials without being stopped. This means they are weakly ionising because they bend to pass through rather than colliding with atoms. Eventually they hit something and do damage. The only thing that block Gamma rays is thick lead and concrete. In the experiment I will be using lead.

In 1896 Henri Becquerel was investigating materials, which glow when placed in an x-ray beam. Curious to find out if strong sunlight caused uranium salt to glow. It was clear that uranium salts emit penetrating radiation, which can blacken photographic film. More interested in x-rays, Becquerel passed the challenge of further investigations on to one of his students, Marie Curie.

Within a few years, Marie Curie discovered other elements such as

I will measure the amount of radiation every 20 seconds. I will use different thickness of lead to show the amount of radiation change.

Beta radiation was shown to consist of fast moving electrons. They can be deflected into a circular path by using a uniform magnetic field. Measurement of the specific charge of beta particles gave the same value as for the electrons, so scientist concluded that beta particles are electrons, produced in a way, which was yet to become clear.

Making sure the Geiger Muller counter was set up and working, I measured the distance (0.1 metre) between the detector and the source (Radium 226) so that if it got jogged it could be put back exactly the same distance as before.

Some common words found in the essay are:
Henri Becquerel, Average Unprotected, Geiger Muller, Gamma Gamma, Safety Procedures, Marie Curie, Penetration Lead, radium 226, Readings Thickness, thickness lead, geiger muller, gamma rays, radiation shown, amount radiation, muller counter, photographic film, background radiation, geiger muller counter, lead shielding, half thickness =, alpha particles emitted, consist fast moving, background radiation comes,
Approximate Word count = 1612
Approximate Pages = 6 (250 words per page double spaced)