Question

Thermal Photon Emission A child with a fever has an innerear temperature of 38.2 ∘C. Treat the eardrum as a blackbody with a radius of 2.5 mm.

Part A

Part complete

At what frequency fpeak is the most intense radiation emitted by the ear?

A = 1.83×10¹³ Hz (Correct)

Part B

At what rate is energy emitted by the child’s ear into surroundings with the temperature 293 K? Use Pnet=eσA(T4−T4s) and assume the emissivity of the eardrum is 1.00.

Part C

How many photons per second are emitted by the eardrum if they all have the same frequency as you found in Part A?

Answer 1