What is the temperature of a star (in kelvin) if its peak wavelength is 150 nm (that is, 150 x 10^-9 m)?

19320 K

Explanation:

The temperature of a star is related to its peak wavelength by Wien's displacement law:

where

T is the absolute temperature at the star's surface

is Wien's displacement constant

is the peak wavelength

Here we have

Substituting into the equation, we find

its a 5.5 n

glad that

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