Please enable JavaScript.

Coggle requires JavaScript to display documents.

p5 - waves - Coggle Diagram

- - - - attach a signal generator to a speaker to generate waves of specific frequencies. use 2 microphones and an olliscope to find the wavelength of the sound waves generated
    - - generate waves in a ripple tank by using a signal generator and a dipper, the generator moves the dipper up and down, to create water waves at a fixed frequency
        
        to measure frequency, use a cork and a stopwatch, watch how many times the cork bounces 'up and down'
        
        to measure wavelength, use a strobe light and use squared paper to measure the distances that (e.g 5 waves) cover
- - - - can be used in the body as ultrasound waves can pass through and partially reflect at different boundaries (e.g between tissues) - if you know the speed of the ultrasound, you can work out the distance between each boundary, making it useful in medical imaging
    - - used by boats and submarines to find the distance to the seabed, to find objects in deep water
- - - - each angle is measured from the normal
    - - draw a normal and a light ray that meet the normal (incident ray)
      - draw the reflected ray, remembering that the reflected ray is always equal to the angle of incidence
      - if there are multiple rays which are parallel, and they're reflecting off a smooth surface, then the reflected rays will also be parallel to eachother
  - - - draw a normal where any ray reaches a boundary
      - if the ray is slowing down (more dense material) it will bend towards the normal (and vice versa)
      - if the ray is passing through a rectangular block, the emerging ray and the incident ray will be parallel
- - - - causes rays to spread out, used for people who are short sighted
    - - causes rays to move together, used for people who are long sighted