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Light and Optics for Kids

Light & Optics

Light is a form of electromagnetic radiation that is visible to the human eye. It behaves like a particle at times and like a wave at other times. Light moves at the constant speed of about 300,000 km/sec (186,000 mi/sec) when they are in a vacuum. The light from Sun takes about seven minutes to reach Earth. And, it takes over four years for light to get to the nearest star from Sun.
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What is Light?
Grade: 5 - 12
A simple explanation of what is light, its properties and different types of light.

The Visible Spectrum
Grade: 7 - 12
Lesson on electromagnetic spectrum.

The Electromagnetic Spectrum
Grade: 7 - 12
Learn about visible light and electromagnetic spectrum. Visible light would be just 1 inch on an electromagnetic scale of over 2,000 miles!

What Is Light Made Of?
Grade: 7 - 12
Ever wonder what exactly is light? What is it made out of? What makes it so fast? Find out.

Grade: 7 - 12
Lesson on waves. It explains some of the key principles applying to waves.

Grade: 7 - 12
Learn about reflection and the ray model of light.

Grade: 7 - 12
Learn about refraction.

Quantum Mechanics: The Dual Nature of Light
Grade: 7 - 12
A Fermilab physicist explains the dual nature of light as waves and photons, and the principle behind photoelectric effect.

Double Slit Experiment
Grade: 7 - 12
Demonstration of double slit experiment. The wave-like properties of light were demonstrated by this famous experiment first performed by Thomas Young in the early 19th century.

Measuring Speed of Light
Grade: 7 - 12
Light is fast. Really really fast. About 186,000 miles a second. Learn how scientists go about measuring the speed of light.

Physics Lesson - Reflection
Grade: 7 - 12
Physics lesson on Reflection.

Physics Lesson - The Law of Reflection
Grade: 7 - 12
Physics lesson on the Law of Reflection.

Physics Lesson - Image Formation
Grade: 7 - 12
Learn how an image forms on a plane mirror.

Physics Lesson - Refraction
Grade: 7 - 12
Physics lesson on Refraction.

Physics Lesson - Index of Refraction, part 1
Grade: 7 - 12
Learn about the Index of Refraction.

Physics Lesson - Index of Refraction, part 2
Grade: 7 - 12
Learn to calculate the Index of Refraction.

Physics Lesson - Snell's Law
Grade: 7 - 12
Physics lesson on Snell's Law.

Physics Lesson - Lenses, part 1
Grade: 7 - 12
Physics lesson on Lenses.

Physics Lesson - Lenses, part 2
Grade: 7 - 12
Learn more about Lenses.

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Common Core State Standards  
Related science topics: Telescope
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