First, WAVES ARE COOL!!!! Also, They Carry ENERGY, transferring it from one place to another, through a MEDIUM, or substance, like WATER…

Ocean waves are just one kind Ocean waves are just one kind. Waves from the sun bring us light, and all the colors of a sunset.

The waves coming from the sun are called Electromagnetic Waves The waves coming from the sun are called Electromagnetic Waves. They transfer energy through tiny electric particles called photons!

Frequency of EM waves http://www.colorado.edu/physics/2000/waves_particles/index.html

Waves can be big or small, long or short, fast or slow – depending on their: Amplitude, Wavelength, and Speed… They can be bunched closely together, or spread out – depending on their Frequency (how many pass a certain point, in a certain amount of time)

Particle Attraction and Vibration http://www.colorado.edu/physics/2000/waves_particles/wavpart2.html http://www.colorado.edu/physics/2000/waves_particles/wavpart4.html

Red orange yellow green blue indigo violet LIGHT AND VISION 1 A. Electromagnetic Spectrum- aka________ 1. What is it? a. Chart that shows all waves of ____________that travel through space b. There are many types of energy waves included in the EMS EMS energy Red orange yellow green blue indigo violet _______________________________________________________ Sun warmth Sun burn _________ __________ Low energy High energy __________________ _____________________

186,000 Refraction changes speed more dense more slowly B. Behavior of Light 1. Light Facts a. Travels at a speed of ________________miles/second!!!! b. Travels in a straight line, unless the material it is moving through changes, in which case light can change direction or “bend” =______________________ ex) Prisms; rippling images in water; wine/water glasses c. This “bending” (refraction) happens because light _______________ as it passes through different substances. The ______ _______ the substance, the ______ ________ light moves 186,000 Refraction changes speed more dense more slowly

2. What can happen to light as it hits an object? a. ___________________- light energy is taken in by object. Ex-_____________ b. ___________________- light energy bounces off the object. Ex-_____________ c. ____________________-light energy goes through the object. Ex-______________ hot blacktop absorbed reflected mirror transmitted window

Light absorption on your roof!!!

Light absorption on your car!!!

Can light reflection save the planet? PS20 consists of a solar field made up of 1,255 mirrored heliostats designed by Abengoa Solar. Each heliostat, with a surface area of 1,291 square feet, reflects the solar radiation it receives onto the receiver, located on the top of a 531 feet-high tower , producing steam which is converted into electricity generation by a turbine.

Concentrating solar power has emerged as one of the most cost-effective solar technologies for large-scale solar projects. Using mirrors or reflective troughs, sunlight from desert areas is concentrated onto a liquid that makes steam. In a power plant, that steam turns a turbine to make electricity.

Light transmission in your house!!! Skylights and windows allow you to light your house without using any electricity 

Once again… 3 THINGS CAN HAPPEN TO LIGHT AS IT HITS AN OBJECT (RED ARROW REPRESENTS LIGHT) Example- mirror, light bounces off REFLECTED Example- window, light goes through TRANSMITTED Example- Photosynthesis is when a plant absorbs light and makes food, Light + water + carbon dioxide  sugar + oxygen ABSORBED Usually when light hits an object all 3 things can occur at the same time