Thermal Radiation Laws.Consider two furnaces of the same size that emit thermal radiation. The thermal radiationspectrum of furnace A peaks at a wavelength of 1,000 nm, while that of furnace B peaks at2,000 nm.
(a) In what portions of the electromagnetic spectrum do these furnaces emit most of their

radiation? What are their peak wavelengths in angstroms (˚

A)?

(b) According to Wien’s law: (i) Which one is hotter? (ii) What is the ratio of their temper-atures?
© According to Stefan-Boltzmann’s law: (i) Which one emits more radiation (energy)? (ii)What is the ratio of the fluxes radiated by these furnaces?

 

Thermal Radiation Laws.Consider two furnaces of the same size that emit thermal radiation. The thermal radiationspectrum of furnace A peaks at a wavelength of 1,000 nm, while that of furnace B peaks at2,000 nm.

(a) In what portions of the electromagnetic spectrum do these furnaces emit most of their

radiation? What are their peak wavelengths in angstroms (˚

A)?

(b) According to Wien’s law: (i) Which one is hotter? (ii) What is the ratio of their temper-atures?

© According to Stefan-Boltzmann’s law: (i) Which one emits more radiation (energy)? (ii)What is the ratio of the fluxes radiated by these furnaces?

 

 

What have you done so far?

 

Part a is asking you what part of the spectrum contains a wavelength of 1 micron and 2 micron

 

Parts b and c even tell you what equations you should be using.