Can you write your own exam?
Try entering your own multiple-choice exam question as a comment below. I'm curious to see if the class can use its collective mind to guess what will be on my exam.
posted by Tony Crider at
10:28 AM
50 Comments:
What is the brightest star in the sky?
[A] Alpha Centauri
[B] Betelgeuse
[C] Polaris
[D] Sirius
What is the speed of light compared to how fast a radio wave travels?
{A}- slower
{B}- half the speed
{C}- the same
{D}- twice the speed
The shortest wavelength of light is...:
[A] X-rays
[B] Gamma Rays
[C] Ultraviolet rays
[D] Microwaves
You can focus the image of the sun with____.
[A] Converging Lenses
[B] Diverging Lenses
[C] Both types of lenses
[D] Neither types of lenses
If the Sun was the size of a grapefruit in Washington D.C., where would the closest star be?
[A] near the Moon
[B] Atlanta
[C] San Francisco
[D] 25 miles down the street
Object A has four times the mass of Object B. Identical forces are exerted on the two objects. Which statement is true?
[A] The speeds of the two objects are equal after 4 seconds.
[B] The accelerations of the two objects are equal.
[C] The acceleration of Object B is four times that of Object A.
[D] The speed of Object A is more than the speed of Object B.
To calculate the magnification, the correct formula is:
A. focal length of the eyepiece lens/focal length of objective lens
B. focal length of the primary mirror/focal length of secondary mirror
C. focal length of the objective lens/focal length of the eyepiece lens
D. focal length of the secondary mirror/focal length of the primary mirror
How fast is the speed of light?
A. 100 million meters per second
B. 300 million meters per second
C. 300 billion meters per second
D. 100 billion meters per second
What are the primary characteristics of converging lenses?
[A] They cause light rays to come together and are usually thinner in the middle.
[B] They cause light rays to move apart and are usually thicker in the middle.
[C] They cause light rays to come together and are usually thicker in the middle.
[D] They cause light rays to move apart and are usually thinner in the middle.
Kfreeze
Focal length is
a) the distance from the middle of the lens (inside glass) to the image of the sun
b) the distance between primary and secondary mirrors in a telescope
c) the distance between diverging and converging lenses in a telescope
The absorption lines of a spectrum can determine if a star...
[A] Has been Blueshifted
[B] Has a certain chemical composition
[C] Has been Redshifted
[D] All of the above
What is special about stars in binary systems?
[A] They do not orbit.
[B] Their orbit varies based on the time of year.
[C] They orbit each other.
[D] They orbit around Earth.
Each type of element represents a different type of...?
a.) atom
b.) nucleus
c.) proton
d.) neutron
As a car us coming towards you, its pitch ___, and when its going away from you its pitch___.
[A] increase, decrease
[B] decrease, increase
[C] stays the same
[D] goes up, goes down
If a car is moving at 20 m/s and accelerates to 40 m/s in 5 seconds, what acceleration does that car experience?
[A] 9.33 m/s^2
[B] 2 m/s^2
[C] 4 m/s^2
[D] 20 m/s^2
According to Newton's third law, if a person exerts a force of 30N against a wall, how much force will the wall exert in return?
[A] 10N
[B] 20N
[C] 30N
[D] 40N
If you apply a net force of 1 N on a .2 kg football, what is the acceleration of the football?
A) 2 m/s^2
B) 5 m/s^2
C) 8 m/s^2
D) 10 m/s^2
How much greater is the light collecting area of a 8 meter telescope than a 4 meter telescope?
[A] two times
[B] eight times
[C] four times
[D] three times
Which focus requires the observer to be inside the telescope?
[A] Cassegrain focus
[B] Prime focus
[C] Coude focus
[d] Newtonian focus
Suppose two stars are separated in the sky by .2" If you look at them through a telescope that can only resolve objects that are separated .3, what will you see?
[A] One star
[B] Two stars
[C] Three stars
[D] None
If you apply a net force of 1 N on a .2 kg football, what is the acceleration of the football?
A) 2 m/s^2
B) 5 m/s^2
C) 8 m/s^2
D) 10 m/s^2
If a star is moving away from you, the absorption lines in its spectrum will
[A] be blueshifted
[B] be redshifted
[C] be whiteshifted
[D] be the same as a stationary star
If you are in an elevator accelerating upwards, but slow down as you reach your floor your weight will be...?
A. Less than your weight at rest
B. Greater than your weight at rest
C. The same as your weight at rest
How far away is Pluto?
[A] 5.3 minutes
[B] 5.3 hours
[C] 5.3 days
[D] 5.3 years
When a "shooting start" hits the ground on Earth, we identify it as a:
[A] meteor
[B] meteoroid
[C] meteorite
[D] asteroid
If the moon were closer to the earth, high tides would:
A) be lower than they are now
B)occur 3 or more times a day than the normal 2
C) be higher than they are now
D) not exist at all
A star appearing to be the color blue's temperature is...
[a] hotter
[b] cooler
[c] bigger
[d] smaller
The Hubble telescope is:
[a]a reflecting telescope with lenses
[b]a refracting telescope with lenses
[c]a reflecting telescope with mirrors
[d]a refracting telescope with mirrors
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant object. We say that the object's spectrum is:
[A] Redshifted
[B] Blueshifted
[C] Skewed
[D] Infrared
Converging lenses are typically ______ in the middle. Diverging lenses are typically ________ in the middle.
A. thinner, thinner
B. thicker, thinner
C. thinner, thicker
D. thicker, thicker
What determines the color of visible light we see?
a. amplitude
b. frequency
c. wavelength
d. speed
How would your mass/weight change on a different planet?
[A] Mass would change, weight would not
[B] Weight would change, mass would not
[C] Both would stay the same
[D] Both would be different
How much greater is the light-collecting area of a 3-meter telescope than a 9-meter telescope?
[A] 3x
[B] 6x
[C] 9x
[D] 36x
A star whose spectrum peaks in the infrared must be ______ than our Sun.
A. cooler
B. larger
C. hotter
D. smaller
What property of light determines the color of visible light we see?
A. amplitude
B. frequency
C. wavelength
D. speed
How much would a person weigh on a planet with twice the radius of Earth and twice its mass?
[A] Twice the weight on Earth
[B] Half the Weight on Earth
[C] One Quarter the Weight on Earth
[D] One Eighth the Weight on Earth
The change in frequency and wavelength of a wave for an observer moving relative to the source of the wave is?
A. Doppler Effect
B. Planck Blackbody Curve
C. Wien’s Law λmax
D. Stefan-Boltzmann Law E
Ignoring air resistance, if three balls were dropped at the same time from 20 meters in the air, one weighting 15 kg, one weighing 2 kg, and the third weighing 32 kg, which one would hit the ground first?
[A] The 32 kg ball
[B] They will hit the ground at the same time
[C] The 15 kg ball
[D] The 2 kg ball
What is the Difference between a Diverging lens and a Converging lens?
A. A Diverging Lens is thinner and cause light rays come together, while a Converging lens is Thicker and cause light rays move apart
B. A Diverging Lens is thicker and cause light rays move apart, while a Converging lens is Thinner and cause light rays come together
C. Converging lenses are thicker and cause light rays to come together, while diverging lenses are thinner and cause light rays tomove apart.
D. None of the Above
If an astronomer had a telescope with an objective lens of 30cm and wanted to increase his/her light collecting power by 9 times, how big of an objective lens would they need?
A)60cm
B)270cm
C)90cm
D)39cm
The first television broadcasts were emitted about 100 years ago. Approximately where are the radio waves that were emitted from those broadcasts now?
[A] Near Pluto's orbit
[B]Just passing relatively local stars in our galaxy
[C]Just leaving our galaxy
[D]Near the Andromeda galaxy
What is the hottest visible color?
a. Orange
b. Blue
c. Violet
d. Red
According to the Doppler Effect a train moving to the right would have sound waves that are
a)longer wavelength
b)shorter wavelength
c)lower frequency
d)lower pitch
Why is the Hubble Space Telescope above Earth's atmosphere?
[A] to be closer to objects in space
[B] to see forms of light blocked by Earth's atmosphere
[C] because it is too large for an observatory on Earth
[D] to avoid damage by the Earth's elements
Which of Newton's Laws of Motion says that an object at rest remains at rest and an object in motion continues in motion with constant velocity unless it is acted on by an external net force?
[A] Newton's 1st Law.
[B] Newton's 2nd Law.
[C] Newton's 3rd Law.
[D] This was not one of Newton's Laws.
Imagine the there is a planet just like earth but four times as far away from the Sun than Earth is. Compared to the force of gravity the Sun experiences due to the Earth, how strong is the force of gravity the Sun experiences due to this planet?
[A]one fourth as strong
[B]one eighth as strong
[C]one sixteenth as strong
[D]four times as strong
The world's largest telescopes have mirrors about how many meters across?
a. 5 meters
b. 10 meters
c. 15 meters
d. 20 meters
How many light years away is the star Proxima Centauri:
A. 1
B. 4.2
C. 5.3
D. 3.5
If a third quarter moon is setting, where is the Sun?
a) rising in the East
b) setting in the West
c) overhead in the South
d) below the horizon
Acceleration may be caused by a change in:
[A] Speed
[B] Direction
[C] Velocity
[D] Any of the above
According to the law of universal gravitation, what would happen to Earth if the Sun were somehow replaced by a black hole of the slightly smaller mass?
[A]Earth would be quickly sucked into the black hole.
[B]Earth would slowly spiral in to the black hole.
[C]Earth's orbit would not change.
[D]Earth's orbit would go into a larger more eccentric orbit.
According to the Doppler Effect a train moving to the right would have sound waves in the front that are
a)longer wavelength
b)shorter wavelength
c)lower frequency
d)lower pitch
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