physics part 1
What are the base quantities?
Fundamental & independent properties of the world
What is the definition of energy?
Energy describes the ability to do work
What do electromagnetic waves travel in?
They travel in a vacuum
What is the SI unit for electrical current?
Ampere (A)
How are x-rays produced?
By the deceleration of electrons in the anode
What are the three things that can happen to the photons when an x-ray beam passes through a patient?
Nothing, Absorption or Scatter
What is ionising radiation?
Radiation with enough energy to remove electrons from an atom
What is background radiation?
The ionizing radiation present in the environment