Science semester test review

The distance from the center of a mirror to the focal point is all the reflection length true or false

False

The image produced by a convex lens is always real. true or false

False

The lens of the eye has fixed focal length true false

False

The type of image formed by a convex lens depends on the location of the object relative to the optical axis. true or false

False

graph that shows the relationship of a stars temperature to its absolute magnitude

H-R diagram

A concave mirror can produce either real or virtual images. True or false

True

All lenses refract the light that passes through them true or false

True

The image produced by a concave lens is always virtual. true or false

True

An image which your brain recieves even thought no light rays pass through it, is called a _____ image

Virtual

When an object is less than _____ focal length(s) away from the lens, the image is no longer real. a. 1 b. 5 c.10 d. 4

a. 1

A red shift in the spectrum of the light from an object indicates the object is moving _____ you. a. away from b. toward c. at a right angle from d. none of the above

a. away from

a wave will travel only as long as it has _____ to carry a. energy b. mass c. amplitude d. matter

a. energy

A group of stars, gas, and dust held together by gravity is a ____ a. galaxy b. constellations c. local group d.both a and b

a. galaxy

you are creatnig a wave on a spring, if you start shaking the spring more slowly, the wavelength of the resulting wave will _______. a. increase b. reflection c. refraction d. diffraction

a. increase

When light is reflected from a surface, as the angle of incidence increases, the angle of reflection______. a. increases b. decreases c. remains the same d. cannot be determined

a. increases

In which one of the following cases will refraction occur? a. light traveling from air to glass b. light reflecting off of a mirror c. light bending around the corner of a door d. green light interfering with blue light

a. light traveling from air to glass

a star begins as a ___, a large cloud of gas and dust a. nebula b. giant c. dwarf d. black hole

a. nebula

When light bounces off a surface it is called ____. a. reflection b. refraction c. diffraction d. interference

a. reflection

A tuning fork starts to vibrate when a certain note is played on the piano. This is an example of ______. a. resonance b. reflection c. refraction d. diffraction

a. resonance

Dark, cooler areas on the suns surface are called _____? a. sunspots b. solar flares c. coronas d. prominecenes

a. sunspots

For a convex lens to produce a real, enlarged, inverted image which of the following must be true? a. the objects distance must be greater than one focal length but less than twice the focal length b. the objects distance must be less than one focal length c. the objects distance must be greater than twice the focal length d. the objects distance must be equal to the focal length

a. the objects distance must be greater than one focal length but less than twice the focal length

The image formed by a plane mirror is _____? a. upright and reversed b. real and upright c. real and reversed d. virtual and inverted

a. upright and reversed

the angle between an incident ray and the normal is called the ___ ___ ______

angle of incidents

When you squeeze together the coils of a spring and then release them, you are creating a ____ wave a. transverse b. compressional c. water d. seismic

b. compressional

waves in which the particles of the medium move only in the same direction as the motion of the wave are _____ waves a. transverse b. compressional c. water d. seismic

b. compressional

_____ are patterns of star in the sky a. galaxies b. constellations c.star clusters d. binaries

b. constellations

outside rear-views mirrors on automobiles are generally _____. a. concave b. convex c. plane d. all of the above

b. convex

____ are thick in the middle and thin at the edges a. concave mirrors b. convex lenses c. concave lenses d. plane mirrors

b. convex lenses

Which type of mirror has its edges curved away from the object? a. spherical mirror b. convex mirror c. plane mirror d. concave mirror

b. convex mirror

if you are lying on a raft, and you notice that the number of waves that go past the raft increases, you also find the distance between each crest a. increases b. decreases c. remains the same d. spreads out

b. decreases

if wavelength is kept constant, which increases as the speed of a wave increases? a. period b. frequency c. amplitude d. phase

b. frequency

The Milky Way and the Andromeda are both ______. a. stars b. galaxies c. nubulae d. quasars

b. galaxies

All of the following are true of the Milky Way EXCEPT that is ________ a. is a spiral galaxy b. has more then 800 billion stars c. is a member of the Local Group d. is 100,000 light years across

b. has more then 800 billion stars

the sun produces energy by fusing hydrogen atoms into ____ atoms in its core a. carbon b. helium c. iron d. oxygen

b. helium

When viewing an object through a microscope, the image will appear ______. a. upright and smaller than the object b. inverted and larger that the object c. upright and larger than the object d. inverted and smaller than the object

b. inverted and larger that the object

the coolest start in the sky are ____ in color a. yellow b. red c. blue d. white

b. red

The Big Bang theory of the formation and expansion of the universe is supported by the observed ________. a. blue- violet shift b. red shift c. "little buck" paradox d. shorter light wavelengths

b. red shift

A concave lens always produces what type of an image? a. inverted b. virtual c. enlarged d. real

b. virtual

The spiral shape of the Milky Way Galaxy CANNOT be seen from earth because a. we are located above the galaxy b. we are located within one of its spiral arms c. our view is blocked by the sun d. none of the above

b. we are located within one of its spiral arms

microscopes use ____ lenses. a. 4 b. 1 c. 2 d.3

c. 2

The ____ states that between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion. a. H-R diagram b. binary star theory c. Big Bang Theory d. "little buck" theory

c. Big Bang Theory

The energy a wave carries is measured by its _____. a. wavelength b. frequency c. amplitude d. speed

c. amplitude

A farsighted eye focuses an image _____. a. in front of the retina b. on the retina c. behind the retina d. in front of the lens

c. behind the retina

a ____ is a regions dense that nothing, including light, can escape its gravity field a. supernova b.white dwarf c. black hole d. supergiant

c. black hole

The hottest stare in space are _____ in color a. yellow b. red c. blue d. white

c. blue

The bowl of a shiny spoon forms an enlarged, upright image similar to that of a _____ mirror. a. Wide-angle b. concave c. refracting d. convex

c. concave

A galaxy that has a shape similar to a football is a(n) ______ galaxy a. normal spiral b. barred spiral c. elliptical d. irregular

c. elliptical

for a given wave, if the frequency doubles, the wavelength _____. a. doubles b. stays the same c. is halved d. quadruples

c. is halved

Which of these is not true about a real image? a. it is enlarged b. it is inverted c. it appears behind the mirror d. it can be projected onto a screen

c. it appears behind the mirror

About 90 percent of the stars in space are _____ star a. nebula b. giant c. main sequence d. white dwarf

c. main sequence

our sun is considered average because its temperature and absolute magnitude place it in the range of the H-R diagram a. white dwarf b. red giant c. main sequence d. supergiant

c. main sequence

Most of the light emitted by the Sun comes from the _______. a. chromosphere b. corona c. photosphere d. prominence

c. photosphere

a place where molecules are far apart is a ____. a. refraction b. reflection c. rarefaction d. compression

c. rarefaction

What type of an image is produces by a convex mirror? a. enlarged and virtual b. reduced and real c. reduced and virtual d. enlarged and real

c. reduced and virtual

Which of the following uses a lens and two mirrors? a. refracting telescope b. microscope c. reflecting telescope d. binoculars

c. reflecting telescope

A _______ gathers light through a lens and projects an image onto film

camera

A _______ mirror can be used to increase the field of view of an observer

convex

if the period of a certain wave (wavelength= 4. 5 m) is 2 seconds, what i the speed of the wave? a. 0.44 m/s b. 1.1 m/s c. 9.0 m/s d. 2. 3 m/s

d. 2. 3 m/s

Where do incident rays that are parallel to the printable axis converge to after reflecting off a concave mirror? a. a real image b. a virtual image c. they don't converge d. a focal point

d. a focal point

by definition, which type of mirror has its edges curved toward the object? a. place mirror b. spherical mirror c. convex mirror d. concave mirror

d. concave mirror

when the crest of one wave passes through the trough of another wave, ____ takes place a. resonance b. diffraction c. constructive interference d. destructive interference

d. destructive interference

A main sequence star becomes a _____ after is uses up the hydrogen in its core a. nebula b. supernova c. black hole d. giant

d. giant

And smooth surface that reflects light to form an image is a _____. a. telescope b. microscope c. lens d. mirror

d. mirror

the intense magnetic fields of sunspots cause archlike eruptions called _______? a. solar eclipse b. corona c. photospheres d. prominences

d. prominences

which one of the following is NOT an example of a mechanical wave? a. sound wave b. water wave c. earthquake wave d. radio wave

d. radio wave

you can see this paper, your desk, and the person in front of you because light is being ______. a. absorbed b. refracted c. diffracted d. reflected

d. reflected

largest know galaxy in this type

elliptical galaxy

Redshift is used as evidence that the universe is contracting true or false

false

processes the produces energy in the sun

fusion

the _______ is the unit of measure for the frequency of wavelengths per second.

hertz

galaxy type without a definite shape

irregular galaxy

distance measurements based on the speed of light; used for objects in space

light-year

The two types of mechanical waves are __________ and ________.

longitudinal and transverse

Classification of most stars on the H-R diagram

main sequence

About 100,000 light-years across

milky way galaxy

Reflecting telescopes use a(n) ____________ instead of an objective lens to gather light from a distant object

mirror

a flat, smooth mirror is referred to as a ______ mirror

plane

recent evidence suggests the Milky Way Galaxy may be this type

spiral galaxy

The virtual image produced by a plane mirror appeared to be the same distance away from the mirror as the object itself. true or false

true

the local group is the galaxy group that includes the milky way true or false

true

when hydrogen nuclei fuse, they produce helium true or false

true

Repeating disturbances that transfer energy through matter or space are _____

waves

stage in a stars evolution formed as the core of a main sequence star uses up its helium and the outer layers escape into space

white dwarf

Under which conditions does a concave mirror produce an enlarged virtual image? a. never b. when the object is between the focal point and the mirror c. when the object is farther away from the radius of curvature d. when the object is farther away than the focal point

B. when the object is between the focal point and the mirror

Light enters your eye through the ______

Cornea

A plane mirror produces a same-size real image true or false

False

Convex mirrors can produce both and real images true or false

False