Question

(a) The star Antaresemits radiation with a peak wavelength of 792nm. What is its surface temperature (in K)? (Assume the star behaves like a blackbody.)

(b) The star Denebemits radiation with a peak wavelength of 340nm. What is its surface temperature (in K)? (Assume the star behaves like a blackbody.)

(c) X-rays are scattered from a target at an angle of 55.8°with the direction of the incident beam. Find the wavelength shift of the scattered x-rays in nm.

Answer 1

In black body radiation while studying nature of thermal radiation a)

Thus

Surface temperature of star Antaresemits is 3636.36 K .

B)

thus

Surface temperature of star Denebemits is 8470.59 K

C)

Now we need to calculate shift in wavelength

thus

Shift of wavelength in scattered x Ray is 0.00106 nm