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.
Similar Questions
A climate scientist puts sensors on the valley floor and on the slopes. During the day, the sensors on the slopes show higher temperatures and more wind blowing up from the valley. Which phenomenon does this indicate?
A physical geographer compares two coastal cities: one at the equator and one near the poles. Both receive the same duration of sunlight in a day. The reason the equatorial city remains warmer is:
An ecologist analyzes wind patterns and concludes they originate from the equator toward the poles. The underlying principle for this observation is:
Important Questions from Heat and Transfer
In summer season, the top and outer surface of the house are painted white because:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is:
The coil of wire used in electric heaters is called a/an________.
Transfer of heat by convection can take place in
A body in motion essentially acquires
A. Kinetic energy
B. Potential energy
C. Mechanical energy
D. Heat energy
