physics mind map

physics mind map

1. rays of light of the object enter your eye the rays change direction as they leave the water the dashed lines show that the rays appear to be coming from a object higher up in the water so the pool looks deeper

2. there is a special case where refraction does not happen if they cross the boundary of 90 degrees in that case it carries straight along

   • if you look down into a pool of water it could look quite shallow but beware it may be deeper than you think

3. if you look at the glass prisms of a chandelier you will see all the colours of the rainbow

   • the colours of the spectrum are orange red yellow green indigo and violet
     • a prism splits white light into a spectrum
       • violet is refracted the most red the least
     • the spectrum appears because the prism refracts the light
     • isaac newton's idea recombining the colours of the spectrum to make white light

4. sound are produced when something vibrates a guitar has strings which vibrate in a wind instrument like a trumpet it is the air inside which vibrates when you play a note

   • as a sound gets louder the trace goes up and down more its amplitude has increased (amplitude is the height of the trace above the centre line
     • the oscilloscope trace is made by a dot travelling across the screen it goes up and down to show the vibrations of sound
   • as a sound gets higher the trace goes up and down more rapidly its frequency has increased