Light Flashcards
What is Light
A form of energy
In what direction does Light travel
In straight lines
What do Luminous objects do
Make and give out their own light
Wha do Non luminous object do
Reflect light from other objects do not make their own light
What does Dispersion mean
Separating of light into its different colours
What are Constituent colours
Different colours that makes up white lights
What are Retractions
Bending of light as it passes from one medium to another
How fast is the Speed of light
Much faster than 3x10*8 m/s
What are Shadows
Light travels in straight lines and cannot pass thorough a solid objects
What is an Eclipse
When the sun is blocked by the moon it is called a solar eclipse, when the moon is blocked by the shadow from the earth it is a lunar eclipse
What is a Rainbow
Red orange yellow green blue indigo violet
What s a Periscope
Two plane mirrors are places at a 45* angles to see over object
What are Converging lens
Makes light rays come together, fixes long sightedness
What are Diverging lens
Makes light rays move out from each other, faces short sightedness
What does a A periscope do
Is made using two plain mirrors at 45* angles to each other
Used to see over objects which are to tall to see over.
