WCS Fill in Blank: Light, Mirrors, and Lenses
the speed of light in space travels at____________
3 million m/s
total internal refraction occurs when______the light waves that strike the boundary between two_______materials can be reflected
all, transparent
an optical fiber is a thin fiber of glass or plastic, covered with another material called______
cladding
white light is composed of different_____from red to violet
colors
optical fibers are used in_____________
communication industry
_____lenses are thicker at the edges than in the center; they cause light rays to______forming an_______image that is smaller than the actual object
concave, diverge, upright
concave mirrors cause light rays to_______
converge
____lenses are thicker in the center than at the edges; they form images based on________the image is form the focal point
convex, how far
at the_______all the light is reflected
critical angle
light travels______when it travels through material such as air, water, or glass
differently
uneven reflection of light waves from a rough surface make a ________reflection
diffuse
convex mirrors cause light rays to______
diverge
light is a(n)_________wave that does not need a medium to travel through
electromagnetic
_________is the distance along the optical axis from the center of the mirror to the________
focal length, focal point
in a concave mirror light waves parallel to the optical axis reflect and pass through the_____________
focal point
flashlights and headlights form a________of light when a light source is placed at the mirror's__________
focus beam, focal point
a telescope uses a_______lens to gather light from distant object
larger
what are the three pigment colors of light?
magenta, cyan, yellow
the material through which a wave traveks us called a ______
medium
compound______uses two convex lenses, the objective lens and the eyepiece lens, to______an image
microscope, magnify
a lens is a transparent object with at least____curved side that causes light to______
one, bend
materials that let no light pass through are called______
opaque
______can make light beam travel in a path that is____________`
optical fibers, curved or twisted
_______mirrors reflect an actual size image that seem to be behind the mirror due to the way the________interprets light
plane, brain
the image formed by a concave mirror depends on the_______of an object relative to the focal point
position
what are the three primary colors of light?
red, blue, green
______telescopes uses a_______mirror to focus light onto a secondary mirror that directs the image to an eyepiece
reflecting, concave
for the eyes to see an object, light must strike the object and ounce off which is called ________
reflection
the law of_______states that the angle of______is equal to the angle of_________
reflection, incidence, reflection
objects appear to have color because they absorb some light waves and reflect others; an object appears because of the light and object_____
reflects
______telescopes use two_____lenses, and objective lens and an eyepiece, to from an image of a distant object
refracting, convex
the bending of light waves caused by a change in speed as they pass through different mediums is called________
refraction
______reflections result from a smooth surface (mirror)
regular
_______is light waves traveling in on direction are made to travel in many different directions
scattering
convex mirrors are used for______
security
the key difference between a telescope and a microscope is the____of the objective lens
size
the_____of the critical angle depends on the two materials involved
size
all the light that enters one end of the optical fiber comes out the other end because of________
total internal reflection
materials that let some, but not all light pass through are called_______
translucent
______materials let almost all light pass through them
transparent
the image formed by a convex mirror is_______and______than the actual object
upright, smaller
light is a wave that carries energy; a light source emits a countless number of ____ that travel in all directions
waves
