Physics Exam #1

which type of electromagnetic wave travels through space the slowest? A. All EM waves travel at the same speed B. ultraviolet C. radio waves D. microwaves

A. All EM waves travel at the same speed

According to the law of reflection of light, the angle of incidence is A. equal to the angle of reflection B. greater than the angle of reflection C. smaller than the angle of reflection

A. equal to the angle of reflection

The worst thing you can do for the health of a green--leafed plant is to illuminate it with only A. green light B. red light C. blue light D. all are equally naughty

A. green light

Light travels fastest A. in a vacuum B. through glass C. through water D. through diamond

A. in a vacuum

As you walk from a plane mirror on a wall, your image A. is always the same size B. changes from being virtual image to real image C. may or may not get smaller, depending on where the observer is positioned D. gets smaller

A. is always the same size

What color will the paper appear to be when illuminated with a cyan light?

Green

What color(s) are reflected by the yellow paper when illuminated by the cyan light?

Green

When light enters a ______ optically dense material it: -speeds up -wavelength increases

LESS

When light enters a ______ optically dense material it: -slows down -speed & wavelength decrease -frequency stays the *same*

MORE

R+B=

Magenta

light does not go through the object, it is either absorbed or reflected

Opaque

In a vacuum, all electromagnetic waves travel at the same speed... True or False?

True

R+G+B=

White

R+G=

Yellow

Virtual images formed by mirrors are always upright images. a. TRUE b. FALSE

a. TRUE

A filter serves the function of ____. a. subtracting color(s) from the light which is incident upon it b. adding color(s) to the light which is incident upon it c. removing nicotine from light so that we can live longer lives d. confusing physics students who are studying color, causing them to live shorter lives

a. subtracting color(s) from the light which is incident upon it

What is the correct order of the electromagnetic spectrum from low to high frequencies?

radio waves microwaves infrared visible UV X-rays gamma rays

If the frequency of a electromagnetic wave quadrupled while the speed of the wave is constant, what would happen to the wavelength?

the wavelength would change by 1/4

light is transmitted through the object

transparent

If I look at white light through a yellow filter, what color will appear?

yellow

Fermats Principle

light travels in the LEAST amount of time

A magenta object is illuminated with yellow light and viewed through a cyan filter. The object will appear

"black"

If total internal reflection occurs at a glass-air surface, then _____. A. no light is refracted B. no light is reflected C. light is leaving the air and hitting the glass with an incident angle greater than the critical angle D. light is leaving the air and hitting the glass with an incident angle less than the critical angle

A. no light is refracted

Complementary Colors

Any two colors of light which when mixed together in equal intensities produce white

White and black are actual colors of light True or False?

B Black is the absence of all light. Things appear black when they do not reflect or emit light. White is the presence of all colors of visible light. Objects appear white when they reflect or emit all wavelengths of visible light (or at least three wavelengths - Red, Blue and Green - in equal intensity).

If the speed of the wave is constant and the wavelength is tripled, what happens to the frequency? A. triples B. 1/3 C. half D. stays the same

B. 1/3

Dispersion occurs when _____. A. some materials bend light more than other materials B. a material slows down some colors more than others C. a material changes some colors more than others D. light has different speeds in different materials

B. a material slows down some colors more than others

Which will warm up quicker in the sunlight? A. a piece of clear glass B. a piece of colored glass C. both are the same

B. a piece of colored glass

For light waves, frequencies mean different A. speeds B. colors C. brightness D. amplitudes

B. colors

The sensation of color is seen when light falls on the eyes A. rods B. cones C. both D. neighter

B. cones

Different colors correspond to electromagnetic waves of different A. speeds B. frequencies C. intensities D. amplitudes E. weights

B. frequencies

If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror A. is equal to the height of the man. B. is equal to one half the height of the man. C. depends on the distance the man stands from the mirror. D. depends on both the height of the man and the distance from the man to the mirror.

B. is equal to one half the height of the man.

The sky is blue because air molecules in the sky act as tiny A. mirrors which reflect only blue light. B. resonators which scatter blue light. C. sources of white light. D. prisms. E. none of these

B. resonators which scatter blue light.

When the image of an object is seen in a plane mirror, the distance from the mirror to the image depends on A. the wavelength of light used for viewing. B. the distance from the object to the mirror. C. the distance of both the observer and the object to the mirror

B. the distance from the object to the mirror.

The color of a transparent object is the same as the light that is A. absorbed B. transmitted C. reflected D. all of these E. none of these

B. transmitted

Which of the following sets of characteristics describes the image formed by a plane mirror? A. real and upright B. virtual and upright C. real and inverted D. virtual and inverted E. all of the previous statements can be correct

B. virtual and upright

If I look at a blue light through a magenta filter, what color will appear?

Blue

If I look at a cyan light through a blue filter, what color will the light appear?

Blue

If I look at cyan light through a magenta filter, what color will appear?

Blue

What color of light does the paper need to be illuminated with to appear "black"?

Blue

What color(s) are absorbed by the yellow paper when illuminated by the cyan light?

Blue

What electromagnetic wave has the highest frequency A. radio waves B. ultraviolet C. Gamma Rays D. x rays

C. Gamma Rays

Which statement about images is correct? A. a virtual image cannot be viewed by the unaided eye B. a virtual image cannot be photographed C. a virtual image cannot be formed on a screen D. mirrors always produce real images because they reflect light

C. a virtual image cannot be formed on a screen

Materials generally become warmer when light is A. transmitted by them B. reflected by them C. absorbed by them D. all of these E. none of these

C. absorbed by them

The image formed in a plane mirror is A. at the same distance in front of mirror as the object is in front of mirror B. larger distance behind the mirror than the distance the object is in front of the mirror C. at the same distance behind the mirror as the object is in front of the mirror D. shorter distance in front of mirror than distance in front of mirror E. at a shorter distance behind mirror than distance in in front of mirror

C. at the same distance behind the mirror as the object is in front of the mirror

which part of EM spectrum has the shortest wavelength? A. radio B. ultraviolet C. gamma D. visible

C. gamma

A mixture of cyan and yellow ink appears A. magenta B. blackish brown C. green D. orange E. blue

C. green

The shortest plane mirror in which you can see your entire image is A. dependent on your distance from mirror B. about 1/3 your height C. half your height D. equal to your height E. about 3/4 your height

C. half your height

Two electromagnetic waves are traveling at the same speed. The wave with the higher wavelength A. has a higher frequency than the other wave B. traveling faster than the other wave C. has a lower frequency than the other wave D. is traveling slower than the other wave

C. has a lower frequency than the other wave

Which part of the EM spectrum has the lowest frequency? A. gamma B. visible C. radio D. infrared

C. radio

Electromagnetic Waves are A. longitudinal and transverse B. longitudinal C. transverse D. none of the other answers given is correct

C. transverse

Light waves are A. beams of moving electrons and other charged particles B. beams of moving atoms C. traveling disturbances in an electromagnetic field D. traveling disturbances in the air

C. traveling disturbances in an electromagnetic field

B+G=

Cyan

If three primary colors of light are to shine on a white wall to produce a white spot, the primaries A. divisive B. multiplicative C. subtractive D. additive

D. additive

A variety of sunset colors is evidence for a variety of A. primary colors B. apparent atmospheric thickness C. elements in the sun D. atmospheric particles E. atmospheric temperatures

D. atmospheric particles

Which of the following is transported by all of the traveling waves? A. matter B. particles C. light D. energy

D. energy

If sunlight were green instead of white, the most comfortable color to wear on a hot day would be A. violet B. blue C. magenta D. green E. yelloe

D. green

In comparing two waves of the same type and same amplitude, the one with the longer wavelength would have A. higher frequency B. higher energy C. both higher energy and higher frequency D. lower frequency E. both higher energy and lower frequency

D. lower frequency

If sunlight were green instead of white, the most comfortable color to wear on a cold day would be A. cyan B. yellow C. green D. magenta

D. magenta

Complementary colors are two colors that A. look good together B. are additive primary colors C. are right for each other D. produce white light when added together

D. produce white light when added together

What color light is transmitted through a piece of red glass? A. white B. orange C. blue D. red

D. red

Which of the following refers to the time required for a single wave to pass a given point? A. none of these B. the frequency C. the wavelength D. the period

D. the period

What is the essential difference between microwaves and blue light A. one has an electric charge and the other does not B. one undergoes refraction and the other does not C.blue light is a beam of photons; microwaves are not photons D. there is no essential difference in the nature of microwaves and blue light other than a difference in frequency and wavelength

D. there is no essential difference in the nature of microwaves and blue light other than a difference in frequency and wavelength

When light reflects from a surface, there is a change in its A. frequency B. wavelength C. speed D. all of these E. none of these

E. none of these

The angle of reflection is the angle between A. the reflected ray and the normal drawn at the point where this ray meets the mirror B. the reflected ray and the incident ray C. the incidence ray and the surface of the mirror D. the reflected ray and the surface of the mirror E. the incident ray and the normal drawn at the point where this ray meets the mirror

E. the incident ray and the normal drawn at the point where this ray meets the mirror

Which of the following describes what will happen to a light ray incident on an glass-to-air boundary at an angle of incidence *greater than* the critical angle? a. total reflection b. total transmission c. partial reflection, partial transmission d. partial reflection, total transmission

a. total reflection

The angle between the incident ray and the normal is known as the

angle of incidence

The angle between the reflected ray and the normal is known as the

angle of reflection

When the image of an object is seen in a *convex* mirror the image will a. always be real. b. always be virtual. c. may be either real or virtual. d. will always be magnified.

b. always be virtual.

Rays of light traveling parallel to the principal axis of a concave mirror will come together a. at the center of curvature. b. at the focal point. c. at infinity. d. at a point half way to the focal point.

b. at the focal point.

The three secondary colors of light are ____. a. cyan, magenta, green b. cyan, magenta, and yellow c. orange, yellow, violet d. red, blue, yellow

b. cyan, magenta, and yellow

Sunsets often have a reddish-orange color associated with them. This is attributable to the phenomenon of _____. a. polarization b. diffraction c. dispersion d. refraction

b. diffraction

If the image was formed in front of the retina rather than behind the retina, then the person would need to correct the vision problem by using a a. converging lens b. diverging lens c. achromatic lens d. alarm clock

b. diverging lens

Which of the following best describes the image for a thin converging lens that forms whenever the object is at a distance less than one focal length from the lens? a. inverted, enlarged and real b. upright, enlarged and virtual c. upright, reduced and virtual d. inverted, reduced and real

b. upright, enlarged and virtual

A ray of white light, incident upon a glass prism, is dispersed into its various color components. Which one of the following colors experiences the greatest amount of refraction? a. orange b. violet c. red d. green

b. violet The greater the refraction, the shorter the wavelength

When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass _____. a. will not change its speed b. will not change its direction c. will not change its wavelength d. will not change its intensity

b. will not change its direction

When the image of an object is seen in a *concave* mirror the image will a. always be real. b. always be virtual. c. be either real or virtual. d. will always be magnified.

c. be either real or virtual.

Which of the following describes what will happen to a light ray incident on an air-to-glass boundary? a. total reflection b. total transmission c. partial reflection, partial transmission d. partial reflection, total transmission

c. partial reflection, partial transmission

The three primary colors of light are ____. a. white, black, gray b. blue, green, yellow c. red, blue, green d. red, blue, yellow

c. red, blue, green

*Diverging* lens are always a. inverted, enlarged and real b. upright, enlarged and virtual c. upright, reduced and virtual d. inverted, reduced and real

c. upright, reduced and virtual

Which of the following best describes the image for a thin diverging lens that forms whenever the magnitude of the object distance is less than that of the lens' focal length? a. inverted, enlarged and real b. upright, enlarged and virtual c. upright, reduced and virtual d. inverted, reduced and real

c. upright, reduced and virtual

When the image of an object is seen in a plane mirror, the image is a. real and upright. b. real and inverted. c. virtual and upright. d. virtual and inverted.

c. virtual and upright.

___________ lens is a lens which converges rays of light which are traveling parallel to its principal axis

converging lens

A sheet of red paper will look black when illuminated with

cyan light

1. The best definition of refraction is ____. a. passing through a boundary b. bouncing off a boundary c. changing speed at a boundary d. changing direction when crossing a boundary

d. changing direction when crossing a boundary

Light which is vibrating in a single plane is referred to as _____ light a. electromagnetic b. transverse c. unpolarized d. polarized

d. polarized

A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block? a. speed is less than when in glass b. speed is less than before it entered glass c. speed is same as that in glass d. speed is same as that before it entered glass

d. speed is same as that before it entered glass

Combining red and green light (with equal intensity) makes ____ light; combining red and blue light (with equal intensity) makes ____ light; and combining blue and green light (with equal intensity) makes ____ light. Choose the three colors in respective order. a. brown, purple, aqua b. brown, magenta, yellow c. yellow, magenta, brown d. yellow, magenta, cyan

d. yellow, magenta, cyan

The reflection of light from a rough surface is call a ________ reflection

diffused

__________ is a lens which diverges rays of light which are traveling parallel to its principal axis

diverging lens

A yellow object is illuminated with green light and viewed through a cyan filter. The object will appear

green