Identify the accurate statement from the following options:

Explanation

Option A is correct: As the temperature of a radiating body goes up, the wavelength of the emitted radiation also increases. Option B is true in the context of heat flow through thick-walled cylinders, but it is not the correct answer here. Option C is incorrect because the peak wavelength actually decreases with temperature rise. Option D defines the angle of incidence, which is the solid angle subtended by a surface at the radiation source.