Light and Optical Systems - Ch1 Flashcards
What were Pythagoras’ ideas about light?
He thought light consisted of beams.
He also believed light came from our eyes.
The problem with Pythagoras’s idea was…
It didn’t take into account that we can’t see in the dark!
Who was Euclid? Tell me what he did.
a Greek mathetician,
he said light travels in straight lines,
used mirrors to prove himself
al - Haytham wrote his own book on optics, what did he accurately describe?
How vision worked!
- light bounces off objects and travels TO the eyes instead of other way round
Describe Sir Isaac Newton’s Light Experiment
he shone white light through a prism to prove that it was made up of multiple different colours
- when shone through 2 prisms it would return back to white
Ole Romer was pretty cool, what did he do to show the speed of light?
he placed 2 mirros on two mountains,
then he sent a beam of light from one mirror to the other,
he was able to measure how long it took for the light beam to travel from mirror to mirror
Tell me the approximate speed of light
300 000 km/s
In 1920, who refined Ole Romer’s method?
Michelson
Optic devices are
technonology that uses light
Microbiology is
the study of micro organisms
microscopes do what?
allwo you to see great detail by using at least 2 lenses
Briefly describe telescopes
devices that make distant things appear bigger, and they use lenses and/or mirrors to collect light
Reflecting Telescopes contain
one large circular mirror with another inside which directs light to the eyepiece
Refracting Telescopes have
2 lenses on each end of a long tube, larger lense gather lights and directs it towards eyepiece
What happens to light when we refer to refraction?
LIGHT BENDS!
