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A Physics lesson about Light

Light and Color. Visible Light, Wavelength of Visible Light. Light is a form of electromagnetic radiation.

Visible Light, Wavelength of Visible Light

Human eye has the capability to detect or sense some part of the complete electromagnetic spectrum. The portion of the electromagnetic spectrum which is sensed by our human eye having wavelength in the range between 380nm and 750nm is called Visible light. Visible Light travels in straight line and the speed of light in vacuum is equal to c = 2.99792458 × 108 m s–1. This is approximately taken as 3 × 108 m s–1 Wavelength of visible is defined as the distance between the two consecutive crests or between two consecutive troughs. Bending Light - Index of Refraction, Light, Snell's Law. Topics Snell's Law Refraction Reflection Optics Prisms Lenses Light Description Explore bending of light between two media with different indices of refraction.

Bending Light - Index of Refraction, Light, Snell's Law

Electromagnetic Spectrum - Introduction. The electromagnetic (EM) spectrum is the range of all types of EM radiation.

Electromagnetic Spectrum - Introduction

Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays. Wave Refraction 1. Wave Refraction 1 Added by Craig Napier on Dec 15, 2008 This activity explains that wave refraction occurs when an object enters a medium that makes it change speed.

Wave Refraction 1

Students look at simulations of light and sound waves travelling through media, to see that refraction changes the wave speed and wavelength, but leaves the frequency unaltered. This item teaches: the construction of ray diagrams to demonstrate the refraction of light the construction of ray diagrams to demonstrate the refraction of waves about the refraction of ocean waves the relationship between the speed of light and its frequency/ wavelength about the ability of sound waves to be refracted about the refraction of light about the refraction of waves the relationship between the speed of sound and its frequency/ wavelength. What Wavelength Goes With a Color?

Colors We Can't See There are many wavelengths in the electromagnetic spectrum the human eye cannot detect.

What Wavelength Goes With a Color?

Energy with wavelengths too short for humans to see Energy with wavelengths too short to see is "more violet than violet". Light with such short wavelengths is called "Ultraviolet" light. Some properties of light. Light. Favorited Favorite 8 Introduction Manipulation of light is a very useful skill for any electronics tinkerer.


From illumination to infrared data transmission, light bridges the electronic and the physical in myriad useful ways. Wavelength. Neon light. SPEED OF LIGHT EXPLAINED. Reflection and Refraction physics Animation. Refraction of light — Science Learning Hub. Refraction1 is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent2 substance into another.

Refraction of light — Science Learning Hub

This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light. Without refraction, we wouldn’t be able to focus light onto our retina3. Refraction By using the example of spearing a fish, Associate Professor Gordon Sanderson, an ophthalmologist from Otago University, explains the principle of refraction. Sun light. WHAT IS LIGHT. Starlight inside a light bulb. After sunset, we can see thousands of stars as white dots across the night sky.

Starlight inside a light bulb

They appear white because our eyes cannot usually detect the colour of such dim objects. However, if we look carefully at the brightest stars we can see that not all of them are white; they have different hues. And based on their colour alone, we can tell which stars are hotter and which ones are colder. SAILS unit Light cc. The Fingerprint of Stars.