Black holes in orbit around a normal star are detected from the earth due to the fricitional heating of infalling gas into the black hole, which can reach temperature greater than `10^(6)K`. Assuming that the infalling gas can be modelled as a blackbody radiator, then the wavelenght of maximum power lies

Options

A. in the visible region
B. in the X-ray region
C. in the microwave region
D. in the gamma-ray region of electromagnetic spectruem

Answer

B

Explanation

`lambda_(m)T=(2.9xx10^(-3))/(10^(6))=2.9xx10^(-9)m=2.9nm`. It lies in the
X-ray region of the electromagnetic spectrum.