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
Physics, 21.06.2019 16:00, mohamedramadan
Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz
Answers: 1
Physics, 22.06.2019 22:00, taliajohnsom8362
Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)
Answers: 1
The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure th...
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