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Test 7
Chapter 17 notes cont. & Part 1 of Ch. 18
34
Physics
11th Grade
12/01/2015

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Term
In a concave spherical mirror, what are the only things reflected through the focal point?
Definition
parallel rays that are close to the principal axis
Term
Where do other rays (not parallel) converge at?
Definition
point closer to the mirror's surface
Term
image defect of a spherical mirror that does not allow parallel light rays far from the principal axis to converge at the focal point and produces an image that is fuzzy, not sharp
Definition
spherical aberration
Term
Why does a perfectly parabolic mirror eliminate spherical aberration?
Definition
parabolic mirrors focus all parallel rays at a point
Term
What is formed behind the mirror when an object is located between the focal point and a spherical concave mirror?
Definition
a virtual image that is upright and larger compared to the object
Term
What is an example of a concave mirror?
Definition
inner surface of a shiny spoon
Term
What is a good example of a convex mirror?
Definition
outer surface of a shiny spoon
Term
What is a convex mirror?
Definition
reflective surface with edges that curve away from the observer
Term
What kind of image does a convex mirror show?
Definition
upright and smaller
Term
What do rays reflected from a convex mirror always do?
Definition
diverges or spread apart so they form virtual images
Term
In a convex mirror, what are behind the mirror?
Definition
F and C
Term
In a convex mirror, what are negative?
Definition
f and di
Term
How are objects perceived in a convex mirror?
Definition
farther away
Term
What doe convex mirrors in large so that an observer can see?
Definition
field of view
Term
What are convex mirrors often used for?
Definition
passenger side rearview mirrors
Term
What kind of images are always behind the mirror so that image position is negative?
Definition
virtual
Term
What does negative magnification mean?
Definition
image is inverted relative to the object
Term
What kind of images do only single plane mirrors and convex mirrors produce?
Definition
virtual images
Term
What kind of reflections doe plane mirrors give?
Definition
simple
Term
What do convex mirrors do?
Definition
expand the field of view
Term
What do concave mirrors act as when an object is within focal long of the mirror?
Definition
magnifiers
Term
half the radius of curvature of the mirror
Definition
restating focal length (f)
Term
What is an example of a virtual image?
Definition
reflection
Term
Where are angles of reflection and incidence equal?
Definition
in a plane mirror
Term
In a plane mirror what is true about virtual images and the actual object?
Definition
the image that forms is the same size as the object and erect and is formed at the same distance behind the mirror that the object is in front of the mirror
Term
Due to what is the path of light bent as it crosses the boundary between two media?
Definition
refraction
Term
What does the amount of refraction depend on?
Definition
properties of two media and angle at which light strikes the boundary
Term
bending of light
Definition
refraction
Term
angle at which the light ray strikes the surface
Definition
angle of incidence
Term
angle at which transmitted light leaves the surface
Definition
angle of refraction
Term
When do light rays travel more slowly and the refracted rays are bent word the normal?
Definition
when they enter a more optically dense medium
Term
What is is smaller than the angle of incidence?
Definition
angle of refraction
Term
ray of light bends in such a way that the ratio of the sine of the angle of incidenced to the sine of the angle of refraction is constant
Definition
Snell's law
Term
What is the constant in Snell's law?
Definition
n (index of refraction)
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