Waves

Waves

1. Spectrum of light

   • Gamma waves
     • Kills cells, often used to kill cancer cells
       • Can also have the ability to kill healthy cells
   • Infrared Radiation
     • Given off by stars and lights
   • Microwaves
     • Used to transmit signals
     • Can create catracts in the eye

2. Emission and absorbing

   • Dark objects are good emitters and absorbers
   • Matt objects are also good emitters and absorbers
   • If an object is cooling it emitts more radiation than it absorbs
   • A perfect black body emits and absorbs all radiation
   • In hot and cold countries it is better to wear light colours

3. Equations

   • velocity= frequency times wavelength
   • time period = 1 divided by frequency

4. Seismic Waves

   • P-Waves
     • Transverse waves that only travel through solids
   • S-Waves
     • Longitudinal solid & liquid travel
     • Refracts when traveling through the mantle