# Question

(a) If you have a fever, is the wavelength of the radiation component of maximum intensity emitted by your body (1) greater, (2) the same, or (3) smaller as compared with its value when your temperature is normal? Why?

(b) Assume that human skin has a temperature of 34oC. What is the wavelength of the radiation component of maximum intensity emitted by our bodies? In what region of the EM spectrum is this wavelength?

(b) Assume that human skin has a temperature of 34oC. What is the wavelength of the radiation component of maximum intensity emitted by our bodies? In what region of the EM spectrum is this wavelength?

## Answer to relevant Questions

Find the binding energy of the hydrogen electron for states with the following principal quantum numbers: (a) n = 3, (b) n = 5, (c) n = 7. (a) For which of the following transitions in a hydrogen atom is the photon of longest wavelength emitted: (1) n = 5 to n = 3, (2) n = 6 to n = 5, or (3) n = 2 to n = 1? (b) Justify your answer mathematically. Show that the orbital speeds of an electron in the Bohr orbits are given (to two significant figures) by vn = (2.2 x 106 m/s/n). A gamma-ray photon scatters off a free proton (initially at rest) at an angle of 45o. The wavelength of the scattered light is measured to be 6.20 x 10-13m. (a) What was the energy of the incoming photon? (b) How much ...Why is the energy threshold for electron–positron pair production actually higher than the sum of their two masses (1.022 MeV in energy terms)?Post your question

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