Reflection and Refraction

Reflection and Refraction

1. waves can be reflected

   • when a wave hits a boundary some of its energy can be reflected
   • angles of reflection are equal to the angle of incidence
   • its reflected because of change in density
     • water is denser than air
     • when a wave reaches a different density some of the wave is reflected at the boundry

2. Waves can be refracted

   • em waves travel slower in denser medians
   • sound waves travel faster in denser medians
   • light rays bend towards the normal because they slow down.
   • light rays bend away from the normal because they speed up

3. Real images

   • a real images is where the light from an images joins together to form an image on a screen.

4. virtual images

   • rays are diverging so the object appears to be coming from a different location.
   • mirrors
   • magnifying