Crave the Wave B
- John Richardsim
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Crave the Wave B
Okay, let's get the Question Marathons populated (starting here).
What is an oscillation? How is an oscillation related to a wave?
What is an oscillation? How is an oscillation related to a wave?
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Re: Crave the Wave B
An oscillation is a regular periodic motion. Oscillations are related to waves in that waves are a type of oscillations.
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Re: Crave the Wave B
Yeah, I'll accept it. Your turn!ampy1234567 wrote:Hm not sure too sure about second partAn oscillation is a regular periodic motion. Oscillations are related to waves in that waves are a type of oscillations.
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Re: Crave the Wave B
Say that galaxy A is actually blue, but appears red from planet B. If planet B is moving at a rate of 0.2c southward and galaxy A is moving at a rate of k*c northward, find k. Assume that the wavelengths of red and blue are 750 and 450 nm respectively, and ignore any possible effects of relativity.
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- Adi1008
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Re: Crave the Wave B
I thought I did this question but it looks like I forgot to submit it or something :/ampy1234567 wrote:Say that galaxy A is actually blue, but appears red from planet B. If planet B is moving at a rate of 0.2c southward and galaxy A is moving at a rate of k*c northward, find k. Assume that the wavelengths of red and blue are 750 and 450 nm respectively, and ignore any possible effects of relativity.
Anyways, here's what I got:
[b] k = 1/3[/b]. Work is here: http://imgur.com/JDUcEoF I got different answers doing it different ways, so it could be wrong T_T
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Re: Crave the Wave B
Yeah that's right
I had the same work as you BTW
I had the same work as you BTW
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Re: Crave the Wave B
When light passes through a different medium and slows down or speeds up, does the frequency or the wavelength change? Why?ampy1234567 wrote:Yeah that's right
I had the same work as you BTW
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Re: Crave the Wave B
The wavelength changes. This is because the wave equation, which is (lamba)*f=speed, shows that a change in speed will cause changes in the frequency and/or the wavelength. Since the frequency remains constant (otherwise you would probably have a large "pile-up" of waves near the interface), wavelength therefore must change.
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Re: Crave the Wave B
no one has done a question for a while, so.........
8. As observed from the Earth, the light from a star is shifted
toward lower frequencies. This is an indication that the
distance between the Earth and the star is
(1) decreasing (3) constant
(2) increasing
8. As observed from the Earth, the light from a star is shifted
toward lower frequencies. This is an indication that the
distance between the Earth and the star is
(1) decreasing (3) constant
(2) increasing
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Re: Crave the Wave B
2: Increasing
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2016 Nationals: Dynamic (2), Disease (6), Crave (8), Fossils (22)
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