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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Science Videos & Lessons: (Reviewed by K-12 teachers) What is Light? Grade: 5 - 12 A simple explanation of what is light, its properties and different types of light. 2:50 |
The Visible Spectrum Grade: 7 - 12 Lesson on electromagnetic spectrum. 4:10 |
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! 2:15 |
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. 3:60 |
Waves Grade: 7 - 12 Lesson on waves. It explains some of the key principles applying to waves. 3:50 |
Reflection Grade: 7 - 12 Learn about reflection and the ray model of light. 5:15 |
Refraction Grade: 7 - 12 Learn about refraction. 4:40 |
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. 8:55 |
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. 5:40 |
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. 4:00 |
Physics Lesson - Reflection Grade: 7 - 12 Physics lesson on Reflection. 4:50 |
Physics Lesson - The Law of Reflection Grade: 7 - 12 Physics lesson on the Law of Reflection. 2:15 |
Physics Lesson - Image Formation Grade: 7 - 12 Learn how an image forms on a plane mirror. 4:45 |
Physics Lesson - Refraction Grade: 7 - 12 Physics lesson on Refraction. 7:10 |
Physics Lesson - Index of Refraction, part 1 Grade: 7 - 12 Learn about the Index of Refraction. 4:45 |
Physics Lesson - Index of Refraction, part 2 Grade: 7 - 12 Learn to calculate the Index of Refraction. 2:25 |
Physics Lesson - Snell's Law Grade: 7 - 12 Physics lesson on Snell's Law. 3:40 |
Physics Lesson - Lenses, part 1 Grade: 7 - 12 Physics lesson on Lenses. 1:50 |
Physics Lesson - Lenses, part 2 Grade: 7 - 12 Learn more about Lenses. 2:45 |
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