Unit C- Light and Optics Flashcards
What is Light
-Light can act like a particle but also acts as a type of energy
-Light travels in packets called photons
-Light is made up of many wavelengths of visible light
What are photons?
Packets in which light travels in
TRUE or FALSE: Light is not made up of multiple wavelengths of visible light
False
What was Pythagoras’ contribution towards light?
Pythagoras thought that light were beams coming from a person’s eye in straight lines
What was Euclid’s contribution towards light and optics?
Euclid discovered that the angle of incidence is exactly the same as the angle of reflection
What was Ptolemy’s contribution towards light?
Ptolemy described how light beams bend when they move from air to gas.
What was Ptolemy’s contribution called?
Refraction.
What did Al-Haytham do?
He accurately described how our vision works and he debunked Pythagoras’ theory on light.
Was Pythagoras’ theory on light true or false?
It was false
Who debunked Pythagoras’ theory on light?
It was Al-Haytham, an scientist from Iraq.
What was Sir Issac Newton’s contribution to light and optics?
It was Sir Issac Newton who discovered that white light is actually a mixture of different colours
How did Sir Issac Newton prove his theory that white light is made up of a mixture of different colours?
He used a prism
What did Albert Michelson contribute to Light and Optics?
He discovered the speed of light accurately
What are the four properties of Light?
- Light can travel in straight lines
- Light can be reflected
- Light can bend
- Light is a form of energy
What are optical devices?
Optical Devices are any form of technology that uses light.
