Physics Chapter 13 Waves and Electromagnetic Spectrum by https://padlet.com/ronaldoyee_161/7kro20x6mcga en-us 2016-07-30 02:14:37 UTC 2018-02-07 04:53:25 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Thunder.png Types of waves ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213287 Transverse and Longitudinal]]> 2016-07-30 02:20:14 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213287 Waves ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213321 In a wave, the energy of the vibration at the source is transported across the medium]]> 2016-07-30 02:23:09 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213321 Transverse wave ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213374 The wavelength is the length of one complete wave
The frequency is the number of vibrations made in one second, measured in Hertz
The amplitude is the distance from the highest/lowest point of the wave to the centre of the wave
The period is the time taken to make a complete wave

Wave Speed = Frequency * Wavelength]]> 2016-07-30 02:27:42 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213374 Electromagnetic waves (usage) ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213428
  • Gamma Rays-used to kill cancer cells
  • X-rays-see through solid objects
  • Ultraviolet rays-sterilize equipment
  • Visible Light
  • Infra-red radiation-source of heat and used in remote controllers and mobile phones
  • Microwave-used in ovens and satellites
  • Radio Waves-used in mobile phones, radio and televisions
    • ]]>     2016-07-30 02:31:44 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117213428     Electromagnetic waves ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365299
  • All transverse wave
  • Travel at 300,000,000 m/s in vacuum*(speed of light)
  • Can travel through a vacuum
  • Can reflect and refract

    • *At different medium, the speed of the waves will change. This will also change the wavelength.The frequency will not change
    ]]>     2016-08-02 11:18:59 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365299     Chemiluminescence ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365579 The process where 2 chemicals, mixed together, react and emit light.

    Chemical A + Chemical B -> Product + Energy(Light)]]>     2016-08-02 11:25:41 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365579     Flurescence ronaldoyee_161 https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365745 The process where a chemical absorbs energy(UV light) and emit light

    Example, when you shine UV light onto a currency note, a chemical on the currency note able to absorb UV light will become excited and possess more energy. The excited chemical then release the energy as light and heat

    Chemical A + UV light -> Excited Chemical A
    Excited Chemical A -> Chemical A + Light + Heat ]]>     2016-08-02 11:31:37 UTC https://padlet.com/ronaldoyee_161/7kro20x6mcga/wish/117365745