| A | B |
|---|
| radiant energy is called | light |
| the tiny, invisible packets of energy in light are called______ | photons |
| photons have no _______ | weight |
| the 7 colors in visible light | red, orange, yellow, green, blue, indigo, and violet |
| all 7 colors in visible light have different amounts of ______ | energy |
| light moves in _________ | waves |
| how waves of light are measured in | frequency |
| ________ frequency waves have more energy than low frequency waves | hight |
| frequency is measure by _____________ | wavelengths |
| a wavelength is the distance between the _____ of one wave and the peak of a wave next to it | peak |
| high point of a wave | peak |
| low point of a wave | trough |
| the colored wave of color with the lowest energy | red |
| the wave of color with the highest energy | violet |
| light travels in _________ lines | straight |
| what is air, wood, or water | medium |
| speed of light in space | 186,000 miles per second |
| distance light travels in a year | light year |
| minutes it takes for sunlight to hit the Earth | 8 |
| most important source of natural light | sun |
| the closest _____ to the Earth is the sun | star |
| an artificial form of light | laser |
| when light passes through something, it is called | transparent |
| when some light passes through something, it is called | translucent |
| when light does not pass through something at all, it is called | opaque |
| when light bounces off of an object, it is called a | reflection |
| when light passes through one medium to another like from air to water, it is called a | refractionb |
| all colors of light combine to form | white light |
| this things separates all colors of light | prism |
| when light hits raindrops, this forms a _____ in the sky | rainbow |
| this is what gives objects their color | pigments |
| primary colors of pigment that make all other colors | red, blue, and yellow |
| this color is made when all pigments of color combine | black |
| the color black _________ all color | absorbs |
| your _______ collect light and form images for you like a camera | eyes |
| light enters your ________ in your eyeball | pupil |
| light passes from your pupil through a ______ in your eyes. Then it is changed to a signal in your brain then into what you are seeing | lens |
