The diagram shows the variation with wavelength of the power per unit wavelength \(I\) radiated from an area of \({\text{1 }}{{\text{m}}^{\text{2}}}\)of two different bodies.

Which of the following is a correct comparison of the temperature and of the emissivity of the two bodies?

D

Many candidates thought that the peaks of the curves being at the same intensity meant that the temperatures were the same (response B). It would appear that the family of curves representing bodies of different emissivities (but the same temperature) had not been widely taught.