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physical phenomena > process > physical process > optical process > radiation modification > wavelength shift > gravitational redshift

gravitational redshift (Einstein effect)
subject			fact

gravitational redshift	has synonym Einstein effect
	has example Object Gravitational Redshift Earth 10-9 white dwarf 10-4 black hole large (proportional to mass divided by radius)
	has definition The rate at which a clock keeps time when it is in a gravitational field is slower than the rate at which it will keep time in the absence of a gravitational field. (The gravitational redshift was experimentally verified by Pound and Rebka in 1960.) The amount of redshift is directly proportional to the mass of the emitting body and inversely proportional to its radius.
	has definition Light is emitted at a lower frequency and longer (or redder) wavelength in a gravitational field than in the absence of a gravitational field.
	has definition Displacement of spectral lines toward longer wavelengths due to the effects of gravity.
	is a kind of wavelength shift
wavelength shift	changes property frequency (and wavelength)
optical process	has domain optics