#### optics test physics

what does C stand for

speed of light

the normal line is _____ to the surface of the mirror

perpendicular

the incident ray is ___ the mirror

going towards

the reflected ray is ____ the mirror

going away from

why does light travel slower through substances like water or glass compared to a vacuum

the light is interacting with the material (friction)

when the light comes out, does it speed up again or stay the same speed it was going in the substance?

speed up again

mirrors are used to _____ light or bounce it back into the same medium

reflect

if the incident angle and the reflected angle from the normal of the surface are equal, then you are seeing what law in play

law of reflection

plain mirrors always form ___ images where the image appears to be behind or in the mirror

virtual

what are the two basic shapes of mirrors

convex, concave

if light rays are being brought together after they touch the surface of the mirror they are said to be

convergent

if light rays are moving apart after they touch the surface of the mirror they are said to be

divergent

when light is reflected into many directions from a surface, you see a ____ reflection

diffuse

when light is reflected in the same direction from the surface, you see a ____ reflection

specular

when waves are bent as they travel from a substance with a different density at an angle greater than zero, we can say the waves

refract

when light goes fro a LESS dense material to a MORE dense material the light will bend ___ the normal

toward

when light goes from MORE dense to LESS dense material it will bend ____ the normal

away

if light is going from a more dense material to a less dense material and the angle from the normal keeps increasing, eventually you reach a point where no light will come out the dense material anymore. This point is known as the _____

critical angle

When the critical angle happens we can say that ___ ___ ___ is occurring

total internal reflection

what makes use of the previous property and are able to transmit light along their length without much energy loss

fiber optics

does the law of reflection still hold for curved mirrors

yes

does the law of reflection still hold diffuse reflections

yes

trucks often have signs that read "if you can't see my mirrors, I can't see you." Write a sentence about if this is true or false and why

true bc of law of reflection

what are the two main points of interest in curved mirrors and lenses

focal point and center of curvature

when we are able to focus the light from an object onto a screen outside the lens or mirror then the image is said to be ___

real

if an image is virtual it will ALWAYS be

upright

CONVEX mirrors and CONCAVE lenses can be called

divergent

CONVEX mirrors and CONCAVE lenses form images the will ALWAYS be

upright, virtual, smaller

Real images are ALWAYS

inverted

CONCAVE mirrors and CONVEX lenses can be called

convergent

the point at which light coming from infinity will focus in a curved mirror or lens is called

focal point

sphere shaped mirrors and lenses often form blurry images, this error is called

spherical abaration

how can you get a concave mirror or a convex lens to form a virtual image?

bring the object between f and the lens/mirror

when light bends around the edges or borders without going through different material with a different density we can say that the light

diffracts