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An Introduction to the Science Behind Solar Energy
Kevin Young
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The Sun
A star that is very close
To Earth
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This is not a new concept…
The sun’s energy has been used for centuries to:
Dry clothes
Dry meats
Plants use solar energy to make food through a process called “photosynthesis”
Therefore, fossil fuels are solar energy stored for billions of years
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Journey to the center of the Sun
Corona
Chromosphere
Photosphere
Convective Envelope
Radiative Envelope
Core
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Solar energy is “made” in the core
T = 15.6 million degrees Celsius
156,000 times boiling water
P = 250 million atmospheres
250 million times the pressure at Earth’s surface
It is a product of nuclear fusion
The energy travels through the sun’s layers, solar system, and eventually reaches Earth
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A special chemical reaction
Simply, when two atomic nucleii are joined to form a larger nucleus,
Energy is given off or absorbed
Hydrogen is fused to form Helium in the sun
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Everything is made up of atoms
Your desk
Your body
Air
Water
They are the building block of the universe.
Different substances are made of different atoms. These are called chemicals.
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Hydrogen (part of water)
Oxygen (what we breathe and the other part of water)
Helium (what makes balloons float)
Sulfur (what makes some water stink)
Sodium and Chloride (these two make up table salt)
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Atomic Structure
Simple Bohr Atomic Model
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Atomic Structure: Hydrogen (H)
Hydrogen contains one proton and one electron