LIGHT
The main source of light
The sun
Light goes through these surfaces almost completely
Transparent surfaces (we can see light shining through and what is on the other side) ex: glass, water, air
These surfaces reflect SOME light
Translucent surfaces
What scientist showed that white light can contain colours
Sir Isaac Newton
The invisible force that Sir Isaac Newton discovered between 2 objects and the center of the earth.
Law of Universal Gravity
(All objects are attracted to each other / pulled to each other)
Light energy absorbed by objects become (3)
Thermal, Electrical & Chemical energy
Light goes through these surfaces partially, only a certain amount is absorbed.
Translucent (Light shines through, but we cannot see what's on the other side) Ex: Tissue paper, plastic
These surfaces REFLECT a small amount of the light in MULTIPLE directions
Opaque: Rough and dark
What did Isaac Newton use to show that white light is indeed composed of colors
A triangular prism
The intensity (how strong) of the force of gravity depends on 2 things
1- The MASS of the object
2- The DISTANCE that SEPARATES the objects from each other
Splitting a beam of light into 7 constituent colours
Dispersion of light
These surfaces absorb a small amount of light
Smooth or pale surfaces ex: White wall or Mirror
(we can see light on its surface, but cannot see through it)
These surfaces reflect a small amount of light
Transparent surfaces
The series of colors found in white light is called
Visible Spectrum
The RANGE of all types of ELECTROMAGNETIC radiation is called
Electromagnetic Spectrum
What percentage of solar light is ABSORBED by planet earth?
70 %
These surfaces absorb most of the light and give off absorbed light in another form of energy (ex: heat)
Rough and dark (ex: black wall)
(we can see light on its surface, but cannot see through it)
These surfaces reflect MOST of the light
Opaque: Smooth or pale
How many colors make up the visible spectrum
7 colors
The only Party of the electromagnetic spectrum that humans can see is called
The visible spectrum
What happens to the 30 % of solar light that is not absorbed by the earth?
It is TRANSFORMED into HEAT or REFLECTED off the ground
Strongest for of energy one the electromagnetic spectrum
Gamma rays
(strong enough to pass through a brick wall)
Weakest form of energy on the electromagnetic spectrum
Radiowaves
The 7 colors that make up the visible spectrum
Red, Orange, Yellow, Green, Blue, Indigo & Violet
(R-O-Y-G-B-I-V)
Main forms of of energy in the electromagnetic spectrum (7)
1-Radiowaves, 2-Ultra violet (UV) rays 3-Microwaves, 4-X-rays 5-Infra-red rays 6-Gamma rays 7-Visible light