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