Light Energy

1. Light Energy

2. What is light? A photon is an energy particle that has no mass and moves at high speed. photons and electromagnetic waves are the same thing, and in everyday terms they are simply referred to as “light”. In fact, a photon can be thought of as a “particle of light” and an electromagnetic wave as a “lightwave”. electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum or through a material medium. In these materials, a magnetic field can change the way the charged particles (mainly electrons) respond to the light electromagnetic field. As a result, the polarization of the light (the plane in which the electric field points) rotates as the light propagates through the material.

3. How does Light travel? Light travels in straight lines until reflected or refracted by another object. Light is reflected when it bounces off of mirrors or shiny surfaces. Light is refracted, or bends, when passing from one medium to another, such as from air to water. A refracted image is distorted or changed.

4. Reflection Light bounces off a surface Examples : • Mirror • Spoon • Chrome • Metal • Shiny pan • Foil • Glass

5. Refraction Light bends when moving from one medium to another Examples: • Eye glasses • Telescopes • Water • Cameras • microscopes

6. Prism https://youtu.be/uucYGK_Ymp0 Prisms can be made from any material that is transparent to the wavelengths. Typical Materials include glass, plastic, and fluorite. It breaks up light to show all the colors.

7. Convex vs. Concave https://youtu.be/fD1544bM_c4 Convex - objects appear larger and closer Concave - objects appear smaller and farther

8. https://dai.ly/x3jyupe

9. Solar Energy Solar panels use light energy that converts to electrical energy. The light from the sun triggers the solar panels to convert that light into another form of energy!

10. Light Reflected Two boxes are painted on the inside with white and black paint. What is the most likely reason the white box looks brighter? More light is reflected off the white paint!