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MSE Test #3
Terms in this set (32)
The Photoelectric Effect by Einstein shows that light, among other things, behaves like a
The spectrum formed when a solid, liquid or opaque gas is heated above absolute zero is called
a continuous thermal radiation spectrum
Star A has a hotter surface temperature than Star B, but both are identical in size and distance. Which of the following is true?
Star A is bluer and brighter than Star B
For the two starts in problem #3, if Star A is exactly two times hotter than Star B, by what factor will the two stars differ in overall brightness?
The surface temperature of our Sun is about 6,000 K. What will be the peak wavelength emitted?
Energy emitted at specific, discrete wavelength by hot excited transparent gases is called
an emission spectrum
According to Einstein's Special Theory of Relativity, if you drive your car at speed near that of light, an observer beside the road will see
the cars' bumper to bumper length shorten
This same observer, looking at your wristwatch, will see
your watch moving slow
On the other hand, you will see
no difference in length or height
And you, looking at your own wristwatch, will see
no difference in time passage
Which of the following is true (regarding picture above)?
Transition A emits a redder photon that Transition B
The spectrum formed when a continuous thermal radiation spectrum is passed through a cooler gas is called
an absorption spectrum
If Observer A measures the beam to be traveling at 300,000 km/sec, what does Observer B measure?
A consequence of the constancy of the speed of light is that ___ and ____ are inextricably linked.
space and time
Stellar Parallax allows us to measure
the distance to a few close stars
the bending of light around an obstacle, such as a pinhole or narrow slit
Which photon wavelength below carries the most amount of energy?
When the electric field components of light are all aligned in the same direction, the light is said to be
Constructive Interference is
when two wave peaks combine in a way that amplifies or reinforces each other
Destructive Interference is
when a wave peak combines with a wave trough in a way that cancels each other
If the wavelength of the laser light is 0.1 meters, what will be seen at that point on the screen?
A bright patch
Star A is intrinsically identical to Star B in every way except that Star A is 3x further away. Therefore Star A would appear ___ times fainter than Star B.
If you know both the apparent and intrinsic brightness of a star, what property directly follows
Star A shows a parallactic shift of 0.1 arcseconds and Star B has a parallactic shift of 0.01 arcseconds. Which of the following is true?
Star A is closer than Star B
How far away is Star A in above question?
10 light years
What is the state of the blob?
It is a solid, liquid or opaque gas (looks like a graph with a peak then decline)
What physical property about the blob can be directly determined from this spectra?
Given that the speed of light is 300,000,000 m/sec, what would be the relativistic length of the car?
Given that the car in above problem has a normal rest mass of 5000 lbs, what would be the relativistic mass of the car?
What is the state of this blob?
It is a hot excited transparent gas (3 separate lines)
What physical property about this blob can be directly determined from this spectra?
Along with many other now-verified predictions, Einstein's General Theory of Relativity explains that the fabric of space-time can be warped by
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