Light and Sound

Light and Sound

1. Reflection

   • In ray diagrams with refection you use a dotted line for the normal and that is where the mirror is
   • Ray diagrams also include incident rays which is the ray which has not change the reflected ray is the light ray that has been reflected by the mirror
   • In a ray diagram the angles of incidence and refection is the difference from the normal in degrees

2. Refraction

   • Refraction is used when bending light through a see through prism
   • This is because the light is going through a less dense medium (air) to a more dense medium (the prism
   • When the light goes out of the prism it goes slower agian

3. Lenses

   • Convex lenses when going through the middle of the lenses the light goes narrower
   • Concave lenses make the light wider
   • In each lenses there is a centre point where all 3 beams of light join together

4. Sound waves

   • A sound wave is made of a trough and a peak
   • The amplitude is measured from the edge of the peak
   • frequency is when how many waves pass a specific point
   • The wave legnth is measured from peak to peak or trough to trough.

5. When light goes through a more dense medium to a less dense medium the light goes towards the normal and when a less dense medium goes into a more dense medium the light goes towards the light.