Question

Consider a star, a light bulb and a slab of ice; their respective temperatures are 8500 K, 850 K and 275.13 K (a) Estimate the wavelength at which their radiation energies peak. (b) Which one would have the highest intensity of radiation. [Tip: intensity is the total energy put out by black body, e.g integral of Eq 1.2 in McQuarrie over all frequencies.] (c) Which object radiates waves which are visible to us ?

Answer 1