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Questions (8)
The same telescope is used to obtain an image using light of the following wavelengths. Which of the images will have the
3 answers
894 views
A TV satellite broadcasts at a frequency of 5000 MHz, (1 MHz = 1 million Hertz). What is the wavelength of this radiation?
a.
1 answer
2,589 views
A star is moving away from an observer at 1% of the speed of light. At what wavelength would the observer find an emission line
2 answers
1,646 views
In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral
2 answers
1,503 views
When used at a wavelength of 1 micron, a telescope can resolve angles as small as 0.1 seconds of arc. How small an angle could
2 answers
1,072 views
At what wavelength will the spectrum of a perfect black body with a temperature of 8,009 Kelvin peak, assuming that a perfect
0 answers
621 views
Star A has 3 times the surface temperature and 0.6 times the radius of Star B. What is the ratio of the luminosity of Star A to
0 answers
581 views
If a star is receding (moving away from us) at a speed of 1.8% of the speed of light, at what wavelength would a spectral line
0 answers
718 views
