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PHYSICS 109: Exam 1
wave |
periodic disturbance traveling in space and time |
specular reflection
|
like a mirror; surface is metallic and smooth |
diffuse reflection |
scatter; 1 ray-->many rays |
luminant |
emits light (ex. lightbulb) |
scatterer |
light needs a ______ to be seen (ex. fog) |
towards |
When a light beam goes into a denser medium, it kinks ______the normal |
away from |
When a light beam goes into a less dense medium, it kinks _____ the normal
|
--- |
Snell's Law |
49 degrees |
critical angle for water |
total internal reflection |
if the angle of light is greater than the critical angle |
1 |
n for air |
1.33 |
n for water |
optical axis |
center line of the lens
|
virtual; same side as object; only demagnify |
resulting image from diverging lens |
M=i/o=h(i)/h(o) |
magnification equation |
1/o + 1/i = 1/f |
lens equation |
inverted
|
the image on the retina is _________
|
near point |
shortest distance of distinct vision |
myopic |
nearsighted |
presbyopic |
farsighted
|
1/f(meters) |
dioptric power
|
converging |
all cameras have a _______ lens |
exposure time (T); film speed (ISO); aperture (f number)
|
3 parameters of photography |
depth of field
|
the range of object distances that produce adequately focused images on film |
greater |
When there is a smaller aperture, there is a _________ depth of field
|
cones |
color, high resolution, central vision, bright light |
rods
|
low resolution, peripheral vision, dim light |
more |
As you move right on the ISO scale, there is _______ light on the film |
less |
As you move right on the exposure time (T) scale, there is _______ light on the film |
less |
As you move right on the f-number scale, there is ______ light on the film. |
grainy/pixely |
As you move right on the ISO scale, the image will be __________ |
blurry (for moving objects) |
As you move left on the T scale, the image will be more ________ |
lose depth of field |
As you move left on the f-number scale, you ___________ |
increase depth of field |
As you move right on the T scale, you __________ |
thick; short
|
A strong converging lens is one that is _______ and has a _______ focal length
|