UNIT C STUDY DECK Flashcards
What is light
A form of electromagnetic energy
What are the 4 properties of light
Light can refract/bend
Light travels in straight lines
Light can be reflected
Light is a source of energy
Who thought that lights were made up of beams and came from the person’s eyes
Pythagoras
What was wrong with Pythagoras’s theory
We would be able to see in the dark!
Who found out that light can bend and travels in straight lines
Euclid
Who described how light bends when they go from air to glass
Ptolomey
Who first discoverd how we see objects
Al-Haytham
Who found out that white light is actually a mix of different colors
Newton
What happens when you place a colored sheet in front of white light
The white light separates the other colors except the color on the filter
Who made the theory that light travels really fast
Ole Romer
What is the speed of light that one of the scientists found out
3, 000, 000 m/s
Who calculated the speed of light that travels to Earth’s atmosphere
Michelson
What did one of the scientists figure out what the speed of light to the earth’s atmosphere
300 000 km/s
How does a compound microscope work
Light hits the curved piece of glass and bounces off to the object to make it bigger
How does a refracting telescopes work
It merges 2 light beams together to create an image
How does a reflecting telescope work
It is a combinations of 2 lenses and a mirror to create and image, the light bounces off the mirror
What is a disadvantage to a refracting telescopes
if the lens is not perfectly smooth or flawless, the image will be bad
The thicker the lens, the harder it is for the light to go through it, but you need a thicker lens to get farther away objects
How does the Hubble telescope work
Uses 2 mirrors, one bowls shaped and one domed shaped to collect and focus light to get an image
How do binoculars work
By having 2 short refracting telescope that work together to magnify the far away object
Why is it better to have a telescope up in space
Is not affected by weather
Does not have to go through the atmosphere
