Presentation on theme: "Anything and (Most) Everything You Need to Know About Light!!!!"— Presentation transcript:
Anything and (Most) Everything You Need to Know About Light!!!!
Light is a form of energy that travels to the Earth from the Sun. Light travels in waves. Without light (and heat) from the Sun, life on Earth would not exist. Plants could not carry out photosynthesis. Bad news for us: All food chains begin plants. No photosynthesis, no plants, no food, no us!!!!!
White light that we see is actually made up of seven colors that create the spectrum. ROY G. BIV stands for red, orange, yellow, green, blue, indigo, violet.
All matter has pigment. The pigment absorbs some colors and reflects others. The color we see is the color it reflects. A banana reflects the color yellow and absorbs all of the other colors of the spectrum. Grass reflects the color green and absorbs all of the other colors of the spectrum. A carrot reflects the color orange and absorbs all of the other colors of the spectrum.
Light travels in waves in a straight line in all directions until it strikes an object. When it strikes our eyes, we SEE it!!!
Reflection- light is reflected, or changes directions by striking shiny surfaces, such as a mirror.
Refraction- the bending of light as it passes from one material to another. Things that “bend” light: water, magnifying glasses, eye glasses, and binoculars. This shows us that light travels at different speeds through different materials.
Absorption- objects absorb and block light, casting shadows. The closer an object is to a light source, the bigger the shadow.
Transparent- materials allow all light that falls on them to pass through. In other words, you can clearly see through a transparent object. Example: glass (window)
Translucent- materials allow light to pass through them, but not very clearly. Examples: shower curtains, stained-glass windows
Opaque- materials do NOT ALLOW ANY light to pass through them. Example: anything that creates a shadow