waves

• wave speed = frequency x wavelength
• speed = distance / time
• what is the unit for wave speed?


  m/s
• longitudinal waves travels faster in solids than liquids and slower in gases
• transverse waves travel quicker in air
• when a waves slows down it bends towards the normal line
• when a wave speeds up it bends away from the normal line
• the refractive index of glass is higher than that of water so light will bend more when passing through glass into water.
• waves transfer energy not matter
• in a transverse wave the oscillations are perpendicular to the direction of energy transfer
• in a longitudinal wave the oscillations are parallel to the direction of energy transfer
• waves transfer kinetic energy
• frequency = number of complete oscillations per second