The peak wavelength of light coming from a giant red star is 660 nm. Calculate the approximate surface temperature of this star in degrees Fahrenheit.

The value is

Explanation:

From the question we are told that  

  The the peak wavelength is  

 Generally according to the Wien's displacement law

Here T is the approximate surface temperature of this star in K so

=>    

Converting to Fahrenheit ,

=>  

measure their densities same density, same sub

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