In what respect, the thermal radiations are different from light radiations,

Explanation

Thermal radiation are electromagnetic waves having wavelength range from 700 nm to 1 mm.
They produce heat when absorbed by a body. They are not visible to our eye and they do not produce any sensation of vision.
Light radiations ae electromagnetic waves having wavelength range from `4000Å` to `7000Å`.
They produce sensation of vision. they are visible to eye having different colours for differnet range of wavelength.