Book 3, Question 30 · Video
Why Do Solar Panels Work?
A solar panel is a sandwich of special silicon. Light packets called photons knock electrons free, so they can flow as current. Sunlight knocks electrons loose, and that flow is el
Read the full answer →What Crafty Clover says in this video
Intro
Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do solar panels work?
The Big Idea
A solar panel is a sandwich of special silicon. Light packets called photons knock electrons free, so they can flow as current. Sunlight knocks electrons loose, and that flow is electricity! That is a lot of power from a light packet!
Step 1
Step one: sunlight hits the panel. Sunlight arrives as tiny light packets called photons. They knock electrons free from their atoms. Photons are much, much smaller than anything you can see.
Step 2
Step two: a one-way path. The two layers of silicon are treated differently. So the freed electrons prefer to travel one way through a circuit to the other layer. Nothing in a solar panel needs to spin or move.
Step 3
Step three: the current flows, and devices run. Wires carry that flow of electrons to where it's needed. Lights and chargers can run on sunshine! On a bright day, a rooftop can run lights, a fridge, and even charge a car.
A Closer Look
Let's take a closer look at a solar panel! Sunlight passes through the glass. It hits the silicon cells and knocks electrons loose. Wires carry the current, and the inverter makes it ready for our homes. Sunlight in, electricity out! Each layer has its own job.
Quick Facts
Quick facts! The first photovoltaic spark was seen in a lab in 1839. Clouds cut the power, but they do not stop it completely. Dark panels get warm in the sun. And clean the dust off only with a grown-up. Calculators, satellites, garden lights, and space stations all drink sunlight this way.
Think Like a Scientist
Now, think like a scientist! Put a solar toy or calculator in the sun. Then move it into the shade. What happens to the toy? Why do you think that happens? Light matters a lot for solar power.
Outro
Solar panels turn sunlight into electricity. Bright ideas, all around! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!