physics- -29 Word Scramble

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Question	Answer
reflection	the bouncing back of a particle or wave that strikes the boundary between two media
normal	a line perpendicular to a surface
Angle of incidence	angle between an incident ray and the normal to a surface
Angle of reflection	Angle between a reflected ray and the normal to a surface is equal to the angle of reflection this is true for both partially and totally reflected waves
virtual image	An image formed through reflection or refraction that can be seen by an obsever but cannot be projected on screen because light from the object does not actually come to a focus
diffuse reflection	the reflection of waves in many directions from a rough surface
reverbation	persustence of a sound as in echo due to multiple reflections
refraction	the change in direction of a wave as it crosses the boundary between two media in which the wave travels at differnt speeds.
wave front	the crest though or any continous portion of a two dimensional or three dimensional wave in whicih the vibrations are all the same way at the same time
mirage	a floating image that appears in the distance and is due to the refraction of light in Earths atmostphere
dispersion	the seperation of light into colors arranged according to their frewuency by interaction with a prism or diffraction grating gratting for an example
critical angle	the minimum angle of incidence for which light ray is totally reflected within a meduim
total internal reflection	the 100% reflection of light that strikes the boundary between two media at an angle greater than the critical angle
opticcal fiber	a transparent fiber usually of glass or plastic that can transmit light down its length by means of total internal reflection
the angle of incidence equals the angle of ______ a.0 reflection b.0normal c. perpendicular	a. reflection
plane mirrors only produce... a. curved images b. virtual images c. fake images	b. virtual images
true or flase: the iage that appears in the mirror is farther away than it appears to be.	false, the image is the same distance
true or flase: convex mirrors are smaller and closer to the mirror than the object is	true
true or false: convex bends inward	false. the convex mirrors bend outward
what are some examples of convex mirrors?	security mirrors and traffic control mirrors
true or false: concave mirrors bend inward	true
true or false concave mirrors virtual image is larger and closer than the object is	true
what are some examples of concave mirrors?	makeup mirrors
what happens to light when it strikes a metal surface?	qalmost all of the energy is reflected back
what happens to light when it stikes glass or water?	some of the energy is reflected and some is transmitted through the glass or water
when light strikes a flat mirror at a certain angle predict the path of the reflected light	the light reflects at the same angle but opposite directions
when you view yourimage in a ________mirror your image is the same distance and as you are. a. convex b. concave c. plane	c. plane
true or false: the sound in a too reflective room sound garbled	true
true or false: the sounding in a too absorbent room sound dull and lifeless	true
name three exmples of refraction that we can see	1. ponds ir swimming pools appear to be more shllow than they actually are 2. a pencil appears bent in water 3. the air above a hot stove seems to shimer
three conditions that would cause refraction?	1. changes in the speed of light as it passes to meduimms 2. variations in the temperature 3. and densities of the same meduim
true or false: refraction only occurs in sound waves.	false, refraction also occurs in light waves
name three examples of uses for optical fibers	1. mechanics to look inside engines 2. doctors to see in a patients body 3. communications
light that bounces off an object is... 1. reflected 2.refracted 3. incidence	reflected
true or false a term that means to bring light rays together is called converge	true
true or false a term that means spread light rays is called converge	false, diverge
a flat mirror is called a..... mirror	plane
true or false: concave mirrors focus light rays to a point	true
______ mirros spread light rays a. plane b. convex c. concave	b. convex
in a _________ mirror you see a smaller upright image	convex
in a ___________ mirror you see a larger upright image	concave
give an example of a concave mirror	flashlights use them makeup mirrors
give an example of a convex mirror	security mirror passsenger rear veiw end mirror
inverted image is a ____-image	real
an upright image is always an _____ image	virtual
true or false: reflection from a rough surface is said to be a polished surface	false, diffused reflection

Created by: MNoonan15