Sound and Light

Sound and Light

1. Sound and Light energy

2. The Law of Reflection

   • The incidence ray is at the same angle as the reflected ray

3. Concave and Convex Mirrors

   • Glasses use concave and convex lenses
   • Concave lenses correct near-sightedness
     • Near-sightedness is where the eye is too long and the focal point is in front of the retina
   • Convex lenses correct long-sightedness
     • Long-sightedness is where the eye is too short and the focal point is behind the retina

4. Light Passing Through Matter

   • The denser the object the slower light goes through it

5. Concave and Convex Mirrors

6. Eye Anatomy

   • Light is sent to the retina where it is then sent to the brain
   • The lens refracts light and flips it upside down, it is flipped the right way up in the brain
   • When it is dark the iris opens the pupil to let in more light. When it is bright the iris closes up the pupil to keep out the light

7. Long and Short Sightedness

8. Light Dispersal and the Spectrum

   • Light is made up of lots of different colours

9. Seeing Colours

10. Sound Transfer

11. The Ear

12. Light is a type of frequency

    • Different types of light uses different frequencies
      • Different light colours use different frequencies, eg red light has a different frequency to green light