Question 1

The Doppler formula states that the ratio of the velocity of a source to the speed of light is equal to the ratio of the change in wavelength caused by the Doppler shift to the source wavelength, or  A spacecraft has yellow headlights which radiate 600nm photons, and is travelling toward a stationary observer. If the spacecraft is travelling at a velocity of 1% of the speed of light (0.01c), what will be the amount of the shift in wavelength observed (in nanometers)?

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Question 2

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

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Question 3

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

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Question 4

Name the three subatomic particles that make up an atom and state their electrical charges

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Question 5

Explain how the structure of the atom creates binding energy, and what limits there are on the amount of binding energy an electron can have.

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Question 6

Law enforcement officers use radar guns based on the Doppler effect to measure the speed of automobiles. Explain why the details of the Doppler effect make it desirable for the officers to park near the road in a place without curves.

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Question 7

A hot blackbody emits a(n) _______________ spectrum.

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Question 8

If   expresses the relationship between Kelvin temperature and the wavelength of maximum intensity in nanometers, what is the wavelength in nanometers of maximum intensity for a star with a surface temperature of 7,250K?

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Question 9

An astronomer records the spectrum of light coming from a distant star. Describe what information the astronomer can deduce from this stellar spectrum, and what physical principles she would apply.

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Question 10

What is binding energy, and what physical effect causes it?

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Question 11

The formula    expresses the relationship between Kelvin temperature and the amount of radiated energy. If a star is three times the temperature of the Sun, how many times more intense is the energy radiated from an equal-sized area of its surface? (Answer with a number only.

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The answer of The formula    expresses the relationship...

Question 12

The NASA Curiosity rover exploring Mars carries a number of scientific instruments, including a spectrograph (a device for recording a spectrum), and a high intensity laser. On several occasions, Curiosity has fired its laser at the surface of a rock sample, while observing the process with a spectroscope. The laser is intense enough to vaporize the atoms on the surface of the sample into a hot, excited gas. 
Why is this a useful technique for the rover to employ?

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Question 13

What process in an isolated atom will make it absorb a photon?

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Quiz 7: Atoms and Spectra