問題一覧
1
additive primary
red, blue, green
2
subtractive primary
magenta, yellow and cyan
3
the bending of light as it travels from one medium to another is called
refraction
4
thé speed of light is different and usually less than c
true
5
index of refraction formula
n= c/v
6
when light passes from a medium with a smaller index of f refraction to one with a larger index of refraction like ( from air to glass) the ray bends towards the normal
true
7
when light passes from a medium with a larger index of f refraction to one with a smaller index of refraction like ( from glass to air) the ray bends away from the normal
true
8
if n1 < n2 it will bend towards the normal
true
9
if n1 > n2 it willl bend away from normal line
true
10
snells law
ni sin ø i = nr sin ø r
11
A ——- is a transparent object that refracts light rayssuch that they converge or diverge to create an image
lens
12
The ——- is the location where the image of anobject at an infinite distance from a converging lens if focused
focal point
13
A lens that is thicker in the middle than it is at the rimis an example of a
converging lens
14
A lens that is thinner in the middle than at the rim isan example of a
diverging lens
15
how many focal length
2 focal point for each point
16
——— of thin-lens systems help identifyimage height and location
ray diagram
17
Converging lenses can produce only real images of real objects.
false
18
when inside the focal point
virtual and upright
19
when outside the focal point
real and inverted
20
——- produce virtual images from real objects
diverging lens
21
the image created by a diverging lens is always a virtual smaller image
true
22
Lens equation ——>
1/p + 1/q = 1/c
23
converging
positive
24
diverging
negative
25
magnification if a lens
M= h1/h = -q/p
26
——- can occur when light moves along a path from medium with a higher index of refraction to one with lower index bof refraction
total internal reflection
27
At the critical angle, refracted light makes an angleof 90º with the norma
true
28
under the critical angle, total internal reflection occurs
false
29
snells law critical angle
sin øc = nr/ ni for ni> nr
30
Total internal reflection occurs only if the index ofrefraction of the first medium is —— the indexof refraction of the second medium
greater than
31
Red, green, and blue are
additive primary colors
32
How many colors of the visible spectrum can the primary colors form?
all
33
What color of light is produced when a primary color is combined with its complementary color?
white
34
Magenta is the complementary color to green. What two primary colors are used to form magenta?
red and blue
35
Pigments rely on colors of light that are
substracted
36
The primary pigments are——the primary colors.
complematry to
37
If a light source is emitting electric fields that are oscillating in random directions, the light is said to be
unpolarized
38
The direction in which electric fields are polarized by transmission
all of the above
39
. In order for refraction to occur, all of the following conditions must bemet except which one?
Light rays strike the medium parallel to the normal
40
In which of the following situations is refraction observed?
light entering a pool of water
41
When light moves from a material in which its speed is higher into amaterial in which its speed is lower, the ray is
bend towards the normal
42
if light passes from glass into air, the ray wil
bend away from the normal
43
If an incident light ray strikes a transparent medium parallel to the normal then refraction
does not occur
44
Which of the following factors change as light waves pass from one transparent medium into another
v and â
45
When a light ray passes from a vacuum into a substance with a largeindex of refraction, the amount of bending experienced by the ray is
large
46
The index of refraction is the ratio of a
the speed of light in a vacuum versus the speed of light in a medium
47
All of the following statements about real and virtual images are trueexcept which one?
Both converging and diverging lenses form real images
48
A light ray passing through the center of a thin lens and both of itsfocal points is
not refracted
49
The size and location of an image formed by a converging lens dependson theThe size and location of an image formed by a converging lens dependson the
location of the object in relation to the lens.
50
the image formed by a diverging lens is
all of the above
51
what relationship does the thin lens equation show?
object distance and image distance
52
The resulting magnification (M) of an image formed by a converginglens is 3.0. Therefore, the object is _______________ that of the image
one third
53
An object is located in front of a converging lens at a distance that istwice the focal length. All of the following descriptions about theimage are true except which one?
the image is upright
54
A positive sign for magnification (M) signifies that the image is
upright and virtual
55
Which of the following is necessary for light to undergo total internalreflection?
light moves from a medium with a higher index of refraction into a medium with a lower index of refraction
56
Total internal reflection occurs only if the
index of refraction of the first medium is greater than the index ofrefraction of the second medium.
57
If the angle of incidence is greater than the critical angle, the ray is_______________ at the boundary.
not refracted
58
a mirage is the result of
all of the above
59
When white light passes through a prism, what color is bent most?
violet
60
Various wavelengths of incoming light are bent at different angleswhen they encounter a refracting medium. What is the name of this phenomenon?
dispersion
61
Which of the following colors of light would bend the most whenentering a refracting medium?
blue