An astronomer measures the light from two objects, A and B, and she finds that they are both black bodies. If the peak in the observed emission of A is at wavelength 2000nm and the peak of B is at 400nm, then what is the ratio of their photospheric temperatures?

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An astronomer measures the light from two objects, A and B, and she finds that they are both black bodies. If the peak in the observed emission of A is at wavelength 2000nm and the peak of B is at 400nm, then what is the ratio of their photospheric temperatures?

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