Light Flashcards
(19 cards)
Light
Is a form of energy
Light travels
In straight lines
Luminous objects
Make and give out their own light
Non luminous objects
Reflect light from other objects, do not make their own light
Dispersion
Separating of light into into its different colours
Constituent colours
Different colours that make up white light
Refraction
Bending of light as it passes from one medium to another
Speed of light
Much faster than sound 3x10(8 squared) m/s
Shadows
Made because light travels in straight lines and it cannot pass through some materials
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
Rainbow
Red, orange, yellow, green, blue, indigo, violet
Periscope
Two plane mirrors are placed at 45 degree angles to see over obstacles
Converging lens
Makes light rays come together, fixes long sightedness
Diverging lens
Makes light rays move out from each other, fixes short sightedness
White light in a prism
Red is least refracted and violet is most refracted
Periscope
Is made using two plain mirrors at 45 degree angles to each other
Refraction
The bending of light as it goes from one medium to another e.g. air to water
Convex
Is converging
Concave
Is diverging
