Physics

• kilo (k)


  x 10 to power of 3
• mega (M)


  x 10 to power of 6
• giga (G)


  x 10 to power of 9
• centi (c)


  x 10 to power of —2
• milli (m)


  x 10 to power of -3
• micro (μ)


  x 10 to power of -3
• nano (n)


  x 10 to power of -9
• Distance (d)


  Metres (m)
• Time (t)


  Seconds (s)
• Speed (v)


  Metres per second (m/s OR ms-1)
• Frequency (f)


  Hertz (Hz)
• Period (T)


  Seconds (s)
• Wavelength (λ)


  Metres (m)
• Activity (A)


  Becquerels (Bq)
• Mass (m)


  Kilograms (kg)
• Energy (E)


  Joules (J)
• Absorbed dose (D)


  Grays (Gy)
• Equivalent Dose (H)


  Sieverts (Sv)
• Equivalent dose rate (H dot)


  Sieverts per second (Sv/s OR Svs-1)
• transverse wave

  • Particles oscillate at 90 degrees to the direction o f travel
  • Example- all em waves
• All waves transfer energy
• Longitudinal wave

  • Particles oscillate parallel to the direction of travel
  • example- sound waves
• Frequency is the nu of waves to pass a point in a second
• Wavelength is the length of one wave
• Period is the time taken for one complete wave to pass a point
• Amplitude is the height of a wave from its undisturbed position.
• Diffraction is the spreading out of waves as they pass through a narrow opening.
• the electromagnetic spectrum is the range of wavelengths and frequencies of electromagnetic radiation
• Refraction is the bending of light as it passes from one medium to another. this happens when the speed of light changes.
• All electromagnetic waves travel at the speed of light
• The angle of incident is the angle between the normal and the incident ray.
• The angle of incident must always be measured from the normal
• The angle of refraction is the angle of a refracted beam of light
• The angle of refraction must always be measured from the normal
• the normal is an imaginary line at 90 degrees to the surface of a material
• The normal is used for measuring angles
• Angle of Incidence


  The angle between the incident ray and the normal
• Angle of Refraction


  The angle between the refracted ray and the normal
• The larger the wavelength, the larger diffraction effect
• The narrower the gap, the larger the diffraction effect