Gravitational time dilation can be observed in the spectra of atoms on the surface of the Sun.

Question

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Gravitational time dilation is a consequence of general relativity, and it predicts that time passes more slowly in stronger gravitational fields. This effect has been observed and measured through a variety of experiments, including the observation of the spectra of atoms on the surface of the Sun. The lower gravitational field at the surface of the Sun causes time to pass slightly more quickly there than it does on Earth, which results in a measurable shift in the frequencies of the spectral lines emitted by atoms on the Sun.

Gravitational Time Dilation Can Be Observed in the Spectra of Atoms