The radiations emitted by a hot furnace are:
infrared
Every hot body emits electromagnetic radiation whose peak wavelength depends on its temperature (Wien's law).
A hot furnace, though very warm to the touch, has temperature well below that required to emit visible or ultraviolet radiation as its main output. Instead, most of its radiation lies in the infrared region of the electromagnetic spectrum, which we perceive as heat.
Ultraviolet radiation comes from very hot bodies like the Sun or arcs. X-rays need atomic transitions or high-energy processes, and microwaves are produced by specific electronic devices, not naturally by a furnace.
Hence, the radiations emitted by a hot furnace are infrared.
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Important Questions from Heat and Transfer
In summer season, the top and outer surface of the house are painted white because:
Which of the following is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials?
What is the heat released by a heating filament rated 24 W when it is kept on for 6 seconds?
Space is left between logs of wood when they are burnt, so that:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is:
