Question
Download Solution PDFWhich of the following statement(s) is/are NOT correct?
(i) Infrared radiation plays an important role in keeping the earth cool.
(ii) Infrared rays are emitted by certain semiconductor light-emitting diodes.
(iii) Water vapour is an excellent infrared ray trapper.
(iv) The thermal motion of the materials decreases after they absorb infrared rays.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- Infrared radiation is a part of the electromagnetic spectrum. Infrared radiations are also known as thermal or heat waves.
- The range of wavelength is between 710nm to 1mm.
- These consist of heat inducing property. These rays have applications in the area of heat production. these rays keep earth hot.
- These are emitted by certain semiconductor light-emitting diodes.
- Water vapour traps heat radiated from Earth so as infra red rays.
- The thermal motion of the materials increases after they absorb infrared rays.
So, Option-(i) and (iv) is are not correct.
Hence the correct answer is Option-1-Both(i) and (iv).
Last updated on May 26, 2025
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