'Star A has a surface temperature of 4000 K while star B is 40,000 K on its surface_ If both have the same radius, indicate the statement that is true:
The radiation spectrum of star B peaks in the infrared range (Hint: The surface of the Sun is = 6000 K)
Luminosity of star B is more than A (integrated over all wavelengths)
Star A emits more at X ray wavelengths than star B
The wavelength at which the emission of star B peaks is "redder" than the corresponding wavelength for star A'