LIGHT ENERGY By Aja Howard and Jenna Altalibi

LIGHT ENERGY By : Aja Howard and Jenna Altalibi

DEFINITION Light is energy that travels in waves. You can see it.

CHARACTERISTICS • Travels in a straight narrow beam (ray) • Reflects or bounces off of things (light) • Different lengths of light make different colors (rainbow/refraction)

SHADOWS • Objects block light rays • Change size by angle “When the sun appears high in the sky the shadow is longer early or late in the day , when the sun appears lower in the sky. ” When the moon covers the sun it casts a shadow on Earth and it is called a solar eclipse.

THE HUMAN EYE • Iris can control amount of light that comes to the human eye • Pupil gets larger in dim light (dark) and smaller in bright light • Human eye sees things upside down but the brain is smart enough and turns it the right way

REFLECTION • Bounces off things “light rays reflect differently off smooth and rough surfaces. ”

REFRACTION • Light changes direction when goes through glass • Pencil placed in glass of water looks broken • Objects underwater look bigger than they are Click play to watch video below

TRANSPARENT • Clear or see through • Eyeball has a transparent cover

TRANSLUCENT • Scatters light (blurry)

OPAQUE • Absorbs light • Can’t see through it

EXAMPLES/USEFULNESS • Helps us live • Helps plants grow • O 2 (oxygen) • Helps humans see

MANMADE • Lightbulbs • Lanterns • Lasers • Microwave • Lamp • Flashlight • Lighthouse

NATURE • Fireflies • Fish • Fire • Rainbows • Sun • Stars

CONCLUSION Light energy is very important in many ways such as helping plants grow , helping everyone see , and help us live.

SOURCES WWW. pebblego. com WWW. pebblegonext. com WWW. mel. org WWW. energystar. gov WWW. eia. gov WWW. discoveryeducation. com WWW. brainpop. com Bing images