X-Rays
Summary of X-rays in the Edexcel GCSE Science Extention Units Student Book. This is P3.11 in the book.
- Created by: Charlotte Hewitt
- Created on: 31-05-13 15:12
View mindmap
- X-Rays
- Ionising Radiation
- Turns atoms into ions by removing some of their outer electrons
- Some electromagnetic radiation are ionising
- More energy the X-rays have, the more ionising they are.
- An X-ray machine consists of an evacuated tube that contains 2 electrodes.
- The cathode (negative) is a wire filament.
- When heated it becomes an electric gun.
- it emits electrons in a process called thermionic emission.
- When heated it becomes an electric gun.
- The anode (positive).
- The cathode (negative) is a wire filament.
- Comparing Currents
- if the temperature of the cathode is increased the number of electrons emitted increases.
- this increases the number of X-rays produced.
- if the temperature of the cathode is increased the number of electrons emitted increases.
- I=Nxq
- N=number of particles flowing each second
- I=current in amperes
- q=charge of each particle in coulumbs
- kinetic energy= 1/2mv2
- m=mass of an electron in kg.
- v=velocity of electron in m/s (v is squared)
- Ionising Radiation
Comments
No comments have yet been made