The maximum is the emissive power of a surface at a temperature T_{1} occurs at a wavelength of λ_{1}. If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ_{1}.

When a vertical plate is heated in infinite air environmental under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum.

A body at 925 K emits an energy of 1.42 x 10^{11}σW/m^{2} (σ is the Stefan-Boltzman constant) in the wavelength band between 3 μm to 4 μm. The fraction of this energy in the total energy emitted over the entire wavelength range is equal to emissivity.

Answer: Option B

Explanation:

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