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AIIMS 2009
Exam
AIIMS
Year
2009
Subject
Physics
Chapter
Electromagnetic Waves

AIIMS 2009 · Physics · Electromagnetic Waves

Black holes in orbit around a normal star are detected from the...

Black holes in orbit around a normal star are detected from the earth due to the frictional heating of infalling gas into the black hole, which can reach temperatures greater than 106 K10^6 \mathrm{~K}. Assuming that the infalling gas can be modelled as a blackbody radiator, then the wavelength of maximum power lies

Options

  1. Ain the visible region
  2. Bin the X-ray region
  3. Cin the the microwave region
  4. Din the gamma-ray region of electromagnetic spectrum

Correct answer

B. in the X-ray region

Step-by-step solution

:λmT=2.898×10−3mK: \lambda_m T=2.898 \times 10^{-3} \mathrm{mK} λm=2.9×10−3106=2.9×10−9 m=2.9 nm\lambda_m=\frac{2.9 \times 10^{-3}}{10^6}=2.9 \times 10^{-9} \mathrm{~m}=2.9 \mathrm{~nm}.Itliesinthe X-ray region of the electromagnetic spectrum.
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