Processing, please wait...
It was processed successfully!
It was processed successfully!
Login Create Free Account
Create Free Account

Light Definition

Light makes objects visible. For example, the sun shines on objects so they are able to be seen.

View Lesson on Introduction to Light
Grades K-2 VideoIntroduction to Light player orange
Preview Only
Oops! It looks like your security settings are blocking this video 🙁

If you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wistia.com, fast.wistia.com, fast.wistia.net, embedwistia-a.akamaihd.net

Sometimes a simple refresh solves this issue. If you need further help, contact us.


Introduction to Light

Fun Facts

  • We can only see things when light is shined on them or when they make their own light.
  • Light goes through some objects but not others.
  • Light is detected by our eye and then electrical signals are sent to the brain.

Why Do We Need To Know About Light

Learning about light helps us see how important it is in our everyday life and in many jobs. It helps keep us safe at home, and is used in technology and movies. Light is important for jobs like planning for emergencies, making electronics, and creating movies or TV shows.

Light is also important in design. It helps make spaces feel nice. Light is considered when making products because of how it goes through materials. People working in architecture, environmental science, and renewable energy need to understand light because it affects both natural and man-made environments.

Frequently Asked Questions

What are some light sources inside the home?
Some examples of light sources inside a home are lamps, television screens, and candles.
What are some light sources outside the home?
Some examples of light sources outside the home are campfires, headlights, and lightning.
Give examples of light sources that are natural and others made by people?
Some examples of natural light sources are the sun, stars and lightning. Some examples of light sources made by people are flashlights, televisions, cell phone screens, candles and car headlights.
Explore More Science Topics
We’ve sent you an email with instructions how to reset your password.
Choose Your Free Trial Period
3 Days

3 days to access to all of our teaching resources for free.

Continue to Lessons
30 Days

Get 30 days free by inviting other teachers to try it too.

Share with Teachers
Get 30 Days Free
By inviting 4 other teachers to try it too.
4 required

*only school emails accepted.

Skip, I will use a 3 day free trial

Thank You!

Enjoy your free 30 days trial