questions
what are the two types of surfaces a flat mirror can reflects on?
rough
smooth/shiny
what does the following stand for?
C.....
F..... and f....
R....
C: centre of curvature
F: the focal point
r: radius of curvature
f: focal lenght
true or false....
for a concave mirror, the magnification can only be negative.
false....
it can be negative and positive.
what is the least number of rays needed to locate an image formed by a flat mirror?
two rays
mirror
explain specular reflection
*the reflection of light reflects in one direction.
*it has a smooth texture.
whats the mirror equation.
1 over F = 1 over p + 1 over q
if the magnification is positive it's what and what?
virtual and upright
example of a diffuse reflection
paper
true or false...
for a flat mirror, the object distance is always less than image distance.
false.....
for a flat mirror, the object distance is always EQUAL TO image distance.
explain diffuse reflection
*the reflection of the light reflects in random directions.
* a reflection from a rough surface.
what type of image does a flat mirror form?
virtual and upright
what does the following stands for?
p...
q...
P= object distance
Q= image distance
two differences between concave and convex.
concave: f=+ / q= + or - / m= + or -
convex: f=- / q=- / m= +
what is the magnification equation?
M= -(image distance) over (object distance)
M= (h') over (h) = -(q) over (p)
true or false....
the texture of a surface doesn't affect how it reflects the light.
false
the texture of a surface affects how it reflects the light.
what does the law of reflection state?
the angle of incidence and angle of reflection should always equal each other.
true or false...
H'=H
true
description of a convex mirror?
virtual
upright
loaction: behind the mirror
the image is smaller.
a concave spherical mirror has a focal length of 35.0 cm. locate the image of an object that is placed upright 55.0cm from the mirror.
find the magnification, image distance and give a description.
magnification = -1.82
image distance= 100
description: smaller, inverted, real,infront of thr mirror.
explain reflection
is the change in direction of an electromagnetic wave at a surface that causes it to move away from the surface.
simply (BOUNCING OFF)
give a description to an object located behind C.
it is a real image
inverted
smaller than object
the image will be between C and F.
whats the relationship between the focal length and the radius of curvature.
r=2f
f=R over 2
what one thing both concave and convex mirrors have alike.
the object distance is always positive.
for spherical mirrors, how many references rays are used to find the image point.
a- two
b- depends on the object
c- three
C- three