Topic 6- Waves

• What does oscillate mean?

  Vibrations (moving back and forth)
• What do waves transfer? And what direction?

  They transfer energy.

  It transfers in the direction they are travelling in.
• What is missing from the photo?

  Crest.

  
• What is missing from the photo?

  Trough

  
• What is missing from the photo?

  Amplitude

  
• What is missing from the photo?

  Wavelength

  
• What is missing from the photo?

  Rest position / equilibrium

  
• What is the amplitude of a wave?

  The maximum displacement of a point of the wave from its undisturbed position.
• What is the wavelength of a wave?

  Ther distance between the same point on two adjacent waves.
• What is the frequency in waves?

  The number of complete waves passing a certain point
• What is the period of a wave?

  The period of a wave is the time it takes for one complete cycle of the wave to occur.
• What type of wave has perpendicular vibrations?

  Transverse waves (up and down)
• What type of wave has parallel vibrations?

  Longitudinal (across)
• What equipment is used to measure the speed of sound?

  Oscilloscope
• What can all waves do?

  Be absorbed, transmitted or reflected
• What is refraction?

  Te wave changing direction as it hits or passes through a medium
• What is infrared?

  A type of wave that can't be seen by the human eye.
• What is a medium?

  A medium is a material like water or air that some waves need to travel through.
• What is a vacuum?

  Empty space, no matter.
• What features do a transverse wave have?

  Peak and a trough.
• What features does a longitudinal wave have?

  Compression and rarefaction.
• What happens to the wave if the medium they are travelling through changes density?

  Change direction of they slow down or speed up.
• What is the change of direction in a wave called?

  Refraction.
• What wave has the highest speed in a vacuum?

  Light waves
• What type of waves are electromagnetic waves?

  Transverse waves.
• Do all EM waves travel at the same speed?

  Yes.
• What type of wave is a sound wave?

  Longitudinal
• What does the Pinna do in the ear?

  Directs sound waves to the auditory canal.
• What does the auditory canal do?

  Links Pinna to the internal structure of the inner ear.
• What does the Tympanic Membrane do?

  It vibrates in response to sound waves- known as the ear drum.
• What is the Ossicles?

  Bones in the middle ear that amplify the sound waves.
• What is the Semicircular Canal?

  Part of the inner ear responsible for balance, it is filled with liquid.
• What does the Auditory Nerve do?

  Transmits nerve impulses to the brain.
• What does the cochlea do?

  Produces nervous impulses from the sound waves that are transmitted to the brain.
• What is the Eustachian tube?

  A tube that connects the middle ear to the back of the throat which equalises air pressure.
• What is the spectrum of EM waves from longest to shortest?

  Radio, microwave, infrared, visible light, ultraviolet, X-rays, gamma rays.
• What are radio waves used for?

  Communication and broadcasting.
• What are microwaves used for?

  Satellite communication.
• What is infrared radiation used for?

  Monitor temperature- infrared cameras, increasing the temperature.
• What type of cable uses visible light?

  Fiber optic cable