q2 waves

• waves


  It is a disturbance propagated through a medium in which energy is transferred
• Nature of Waves

  ➢ It is a traveling disturbance

  ➢ It carriers energy from one phase to another

  ➢ Vibration causes wave motion

  ➢ Travels through a medium
• Medium


  Any kind of matter through which a wave can travel
• A wave transfers from particle to particle in a medium
• different media for waves


  solid liquid gas
• label

  A) crest

  B) trough

  C) amplitude

  D) wavelength

  
• Top of a wave, maximum point

  crest
• trough


  bottom of a wave, minimum point
• wavelength


  how far apart the waves
• lambda (λ)


  11th letter of the greek alphabet meaning wavelength
• frequency


  Number of waves that travel past a point every second
• Shorter Wavelength = Higher Frequency

  Longer Wavelength = Lower Frequency
• amplitude

  distance between the peak or trough of the wave and the equilibrium position
• type of waves according to propagation

  1. mechanical (transverse, longitudinal, surface)
  2. electromagnetic (em spectrum - Radio waves, ultraviolet, microwaves, xrays, infrared, and gamma rays)
• mechanical waves propagate only through


  solid liquid gas
• transverse waves - up and down

  longitudinal - parallel, back and forth

  surface - combination of transverse and longitudinal, circular motion
• cases of pressure in longitudinal wave


  rarefactions - low pressure, farther from each other

  compressions - high pressure, closer together
• important source of electromagnetic radiation for the earth


  sun
• ultraviolet (UV) waves


  main cause of sunburn
• sig fig rules

  1. ALL NON ZERO DIGITS ARE SIGNIFICANT
  2. ALL ZERO BETWEEN SIGNIFICANT NUMBERS ARE SIGNIFICANT
  3. A FINAL ZERO OR TRAILING ZEROES IN THE DECIMAL PORTION ONLY ARE SIGNIFICANT
  4. TRAILING ZEROES IN THE DECIMAL NUMBER WITH THE DECIMAL SHOWN ARE SIGNIFICANT
  5. TRAILING ZEROES IN A WHOLE NUMBER WITH THE DECIMAL SHOWN ARE SIGNIFICANT
  6. TRAILING ZEROES IN A WHOLE NUMBER WITH NO DECIMAL SHOWN ARE NOT SIGNIFICANT
  7. LEADING ZEROES ARE NOT SIGNIFICANT