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1.
(1 point)
Which of the following is the correct formula for focal point calculation?
F= I + O
1/F = I x 1/O
F = 1 x 1/O
1/F = 1/I + 1/O
2.
(1 point)
Which of the following is the correct formula for lens power (P)?
P = 1/f + 1/O
P = 1/f
P = f x O
P = O/f
3.
(1 point)
The absolute index of refraction for a substance is 2.0 for light having a wavelength of 5.9 x 10
-7
meter. In this substance what is the critical angle for light incident on a boundary with air?
25 Degrees
30 Degrees
35 Degrees
40 Degrees
4.
(1 point)
Which phenomenon can occur with light, but not with sound?
Doppler effect
Interference
Polarization
Refraction
5.
(1 point)
The threshold frequency of a photo emissive surface is 7.0 x 1014 hertz. Which electromagnetic radiation, incident upon the surface, will produce the greatest amount of current?
Low intensity infrared radiation
High intensity infrared radiation
Low intensity UV radiation
High intensity UV radiation
6.
(1 point)
A spherical mirror that forms only virtual images has a radius of curvature of .5 meters. The focal length of this mirror is?
-.125 m
-.25 m
2.5 m
2.75 m
7.
(1 point)
A spherical concave mirror is used in the back of a car headlight. Where must the bulb of the headlight be located to produce a parallel beam of reflected light?
Between the principal focus and the mirror
Beyond the center of curvature of the mirror
At the principal focus of the mirror
At the center of the curvature of the mirror
8.
(1 point)
An object .080 meter high is placed .20 meter from a converging (convex) lens. If the distance from the image of the lens is .40 meter, the height of the image is?
.08 m
.16 m
.24 m
.33 m
9.
(1 point)
A diverging (concave) lens can form images that are?
Virtual, only
Inverted, only
Either virtual or real
Either inverted or erect
10.
(1 point)
A ray of light strikes a plane mirror at an angle of incidence equal to 35 degrees. The angle between the incidence ray and the reflected ray is ___.
45 degrees
60 degrees
70 degrees
80 degrees
11.
(1 point)
Compared to the wavelengths of visible light the wavelengths of UV light are
Shorter
Longer
The Same
12.
(1 point)
What is the energy of a quantum of light having a frequency of 6.0 x 10
14
hertz?
1.6 x 10
4.0 x 10
1.3 x 10
5.0 x 10
-7
J
13.
(1 point)
Experiments performed with light indicate that light exhibits
Particle properties, only
Wave properties, only
Both particle and wave properties
Neither particle or wave properties
14.
(1 point)
What is the speed of light in a medium having an absolute index of refraction of 2.3?
.77 x 10
1.3 x 10
1.5 x 10
2.3 x 10
8
m/s
US