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Gravitational redshift is Question 31 options: a) the reason supergiant stars are usually red in color. b) the stretching of the wavelength of light due
Gravitational redshift is Question 31 options: a) the reason supergiant stars are usually red in color. b) the stretching of the wavelength of light due to a gravitational field. c) the cause of red skies at sunset and sunrise. d) the stretching of the wavelength of light due to the source moving away from the observer
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