Light and Sound

Light and Sound

1. light!

   • light carries energy and travels as a wave
     • light travels at 300000000 m/s or 300000 km/s
       • light waves travel in straight lines
   • laterally inverted - the image is reversed from left to right
     • ray of incidence
       • ray of reflection
   • when the ray moves from a less dense medium to a more dense medium the light ray bends towards the normal
     • when the ray moves from a less dense medium to a more dense medium the light ray bends away from the normal
       • when light rays pass through a glass lens they are reflected. this means that they change their direction. a convex lense is fat in the middle. it brings the rays of light closer together. the rays of light are converging. the rays meet at a point which is called the focus. A concave lens is thin in the middle. it makes the rays of light spread out. The rays of light are diverging
         • spectrum