unit c topic 1

• what is a reflecting telescope?

  Telescope using 2 mirrors to reflect light
• What is a refracting telescope?

  uses 2 lenses that bend light
• 4 properties of light are?

  -travels in straight lines, light can bend, light can be reflected, light is a form of energy
• what are some examples of optical devices?

  Microscope, telescope, camera, binoculars
• who is phythagoras?

  light travels in straight lines, - light came from our eye and hit other things,  we could then see the objects our light hit.
• who was euclid?

  • light reflects off a mirror at the same angle it hits it.
• who was ptolemy?

  explained why light bends in glass or water.
• who was al haytham?

  wrote a book describing the properties of light. He also tried to explain rainbows.  He was the first to describe how vision worked.
• who was isaac newton?

  did explain a rainbow, invented the reflecting telescope, and showed that white light was really all the colors of light.
• who was ole romer?

  was the first to time the speed of light.
• who was A michealson?

  also timed the speed of light.