science

• who described how a changing electric field produces a magnetic field and showed that a changing magnetic field creates an eletric field

  james maxwell
• also known as electromagnetic radiation


  electromagnetic energy
• who generated and detected em waves

  heinrich hertz 1887
• em waves are classified as

  transverse waves
• electromagnetic waves are perpendicular (at right angles) to one another and to the direction of propagation
• which represents the family of em waves

  electromagnetic spectrum
• what speed does the em waves travel

  $3x10^8 m/s$
• temporary disturbance that transfer energy from 1 place to another

  electromagnetic waves
• doesn't require a medium to travel


  em waves
• requires a medium to travel

  mechanical waves
• em waves are arranged according to

  frequency and wavelength
• low frequency wavelengths have longer wavelengths
• high frequency have shorter wavelengths
• inverse relationship between frequency and wavelength
• equation of speed

  c = f/m
• equation of frequency


  f = c/m
• equation of wavelength 


  m = c/f
• energy that em waves carry


  radiation
• em waves are also called as

  electromagnetic radiation
• the higher the frequency the more energy
• number of waves passing a point in a certain time


  frequency
• distance between 2 crests or troughs


  wavelength
• height of wave


  amplitude
• highest point in a wave


  crest
• lowest point in a wave


  trough
• location & velocity of storms, clouds and decripitation


  doppler radar
• change in observed frequency of a wave


  doppler effect
• echoes from ocean & ice surfaces 


  radar altimeter
• earth to satellite


  uplink
• satellite to earth


  downlink
• measure speed of a vehicle 


  radar speedgun