Science flashcards- Topic 1: The Challenge of Light
(22 cards)
Archimedes
Planned to use mirrors and the sun to fight battles.
Pythagoras
Thought that light emitted from our eyes, hit an object, and bounced back to our eyes.
Euclid
Discovered that light can be reflected and that it travels in straight lines.
Ptolemy
Described how light beams bend when they go form air to gas.
Newton
Showed that white light is actually a mixture of different colours of light.
Al-Haytham
First to describe how vision worked. That light will reflect off objects and into our eyes.
Ole Romer and Michelson
Determined the speed of light
What are the four basic properties of light?
-Light can be reflected
-Light can bend
-Light can travel in straight lines
-Light is a form of energy
What was the problem with Pythagoras’s theory?
That if his theory was true, then you would be able to see in the dark
What is the definition for a optical device?
Any technology that uses light
What is an example of a optical device?
-Microscope
-Telescope
-Binoculars
What is the definition for a microscope?
An optical device used for viewing very small objects
It has two lenses
(The objective lens and the eyepiece lens)
Who were the inventors of the microscope?
Hans and Zacharias Jansen
What did Antoine Van Leeuwenhoek discover?
“Little Animals”
-The first descriptions of microscope items
-Bacteria
-Red blood cells
What is the definition of a telescope?
An optical device used for viewing distant objects
What are the two different types of telescopes?
-Reflecting telescope
-Refracting telescope
What is the definition for a refracting telescope?
An optical device that contains two lenses, one of each end of a long tube.
What is the definition for a reflecting telescope?
An optical device that uses a large circular mirror that curve inward.
What is the definition for binoculars?
A device used for viewing distant objects.
It is made up of two short refracting telescopes fitted together.
How is a microscope similar to a refracting telescope? How is it different?
The are the similar because they both are enlarging images.
They are different because a telescope takes light from distant objects while a microscope passes light through a small object.
Compare refracting and reflecting telescopes:
Reflecting telescopes use mirrors
Refracting telescopes use different lenses.
