Physics, 25.04.2020 04:25 caprisun1440
The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure the motion of stars and galaxies. In 1929, Edwin Hubble discovered that light from distant galaxies was shifted away from the blue end of the spectrum and towards the red end of the spectrum. Red light has a longer wavelength (and a lower frequency) than blue light. What could Hubble conclude about these galaxies?
A. The distant galaxies are growing smaller.
B. The distant galaxies are growing larger.
C. The distant galaxies are moving towards the Earth.
D. The distant galaxies are moving away from the Earth.
Answers: 2
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When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.
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Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?
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Using proper grammar, spelling, and punctuation, write at least one 5 sentence paragraph describing 3 ways we use the elements of the electromagnetic spectrum (ems) in our everyday lives.
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You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?
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The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure th...
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