_____ is a form of energy.
light
Often sources of _____ give off heat.
light
_____light is made up of all colors.
white
colors of light
red, orange, yellow, green, blue, indigo, violet; ROYGBIV
All light is made of _____
waves
A _____ is the distance from the top of one wave to the top of the next wave.
wavelength
_____ has the longest wavelength while _____ light has the shortest.
red, violet
_____ is the 7 colors of light that make up white light.
visible spectrum
The _____ spectrum is only a small part of the _____ spectrum.
visible, electromagnetic
The _____ wavelengths are _____ waves and have the _____ energy.
longest, radio, lowest
The _____ wavelengths are _____ waves and have the _____ energy.
shortest, gamma, highest
A _____ forms when light is blocked and has the shape of whatever is blocking the light.
shadow
Shadows show that light travels in _____ lines or _____.
straight, rays
Light cannot _____ or _____.
bend, go around things
The size of a shadow depends on the _____.
angle of the light ray
Light that reaches your eyes is ____ light.
reflected
____ occurs when light strikes a surface and bounces off.
reflection
Most surfaces _____ at least some light.
reflect
_____ surfaces reflect the most light.
shiny
The law of reflection is when the _____ of reflected light is _____ to the ______.
incoming angle, equal, outgoing angle
_____ is the bending of light as it passes from one material to another.
refraction
Most materials _____ the light falling on them.
reflect
Some materials allow light to _____.
pass through
_____ happens when light passes through glass, water, or other transparent materials.
refraction
Light travels at different _____ in different materials.
speeds
The _____ the material, the _____ light travels through it.
denser, slower
Light _____ and _____ at the point where it passes from _____ to _____.
slows, bends; air, water
During refraction the light ray simply _____ as it passes from one _____ to another.
changes direction, material
2 kinds of lenses.
convex, concave
_____ lens bulges in the middle and brings rays of light _____
convex, together
_____ lens curves _____ and spreads light rays _____.
concave, inward, apart
The color of an object depends on the color of _____ it reflects.
visible spectrum
_____ and _____ are not true colors
black, white
_____ objects do not absorb any _____.
white, light energy
White objects are _____ in sunlight.
cooler
_____ objects absorb all of the _____ of the _____.
black, wavelengths, visible spectrum
Black objects are _____ in sunlight.
warmer
_____ objects are made of material that light cannot pass through (wood, people).
opaque
_____ objects let light pass through ( glass).
transparent
_____ material reflects some light and lets the rest pass through (a plastic cup).
translucent
_____ are thin beams that have one _____ of light.
lasers, wavelength
All of the _____ of a laser travel in the _____ direction.
laser, same
Lasers create a very _____ high-energy _____.
intense, beam
_____ are tubes made of glass or plastic.
optical fibers
Optical fibers keep the light energy _____ the entire length of their _____.
inside, fiber
Information in _____ can travel at nearly the speed of _____.
optical fibers, light
What happens when light reaches your eyes?
1. Light passes through the _____ which is the _____.
cornea, thin clear tissue covering the eye
What happens when light reaches your eyes?
What happens when light reaches your eyes?
2. Light then passes through an opening called the _____, which is the _____.
pupil, black spot at the center of each eye
What happens when light reaches your eyes?
3. After light passes through your pupils, it travels through the _____. Each lens _____ light to the _____ of your eye.
lens, focuses, back
What happens when light reaches your eyes?
4. A tissue called the _____ covers the back of your eyes. The _____ are actually _____.
retina, images, upside down
What happens when light reaches your eyes?
5. _____ travel along your _____ to your brain, which sees the image _____.
images, optic nerve, right side up
What happens when light reaches your eyes?
CPLRO
CORNEA, PUPIL, LENS, RETINA, OPTIC NERVE