Heat and Mass Transfer
The energy distribution of an ideal reflector at higher temperatures is largely in the range of

Wavelength has nothing to do with it
Longer wavelength
Shorter wavelength
Remain same at all wavelengths

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Heat and Mass Transfer
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,

The better insulation must be put inside
One could place either insulation on either side
The better insulation must be put outside
One should take into account the steam temperature before deciding as to which insulation is put where

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