Waves

• Transverse wave

  Wave with oscillations/vibrations perpendicular to the direction of energy transfer
• Longitudinal wave

  Wave with oscillations/vibrations parallel to the direction gf energy transfer
• Compression

  Area in longitudinal waves where particles are squashed
• Rarefaction

  Area in longitudinal wave where particles are pulled further apart
• Amplitude of a wave

  Maximum displacement of a point on the wave from its undisturbed position
• Wavelength of a wave

  Distance from a point on one wave to the equivalent point on the adjacent wave
• Frequency of a wave

  Number of waves passing a fixed point per second
• Wave speed

  Speed at which the energy is transferred through a medium
• Amplitude unit

  meter
• Wavelength unit

  Meter
• Frequency unit

  Hertz (hz)
• Wave speed unit

  Meters per second
• Electromagnetic spectrum increasing frequency

  Radio waves

  Microwaves

  Infrared radiation

  Visible light

  Ultra violet

  X rays

  Gamma rays
• Mechanical waves require a..

  Substance to travel through
• What type of wave are electromagnetic waves

  Transferse
• Which part of the spectrum can humans see

  Visible light
• How can electromagnetic waves be produced

  Changes inside a atom/atomic nucleus
• How are gamma rays produces

  Changes in the nucleus of an atom
• How can radio waves be produced

  Oscillations in an electrical circuit
• What type of electromagnetic waves are harmful to the human body

  Ultra violet, x-rays, gamma rays
• What are radio waves used for

  Transmitting television, mobile phone, Bluetooth signals
• What are microwaves used for

  Satellite communications, cooking food
• What is infrared radiation used for

  Heating, remote controls, cooking food