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Question
When a blackened bulb thermometer is moved beyond the red region of the visible spectrum, there is a rapid rise in the temperature. This is due to the presence of ______.
Options
Infrared radiations
Ultraviolet radiations
X-rays
Radio waves
MCQ
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Solution
When a blackened bulb thermometer is moved beyond the red region of the visible spectrum, there is a rapid rise in the temperature. This is due to the presence of infrared radiations.
Explanation:
A blackened bulb thermometer exhibits a fast increase in temperature when placed beyond the red area of the visible spectrum, due to infrared radiation. These invisible, longer-wavelength radiations possess a significant heating effect, which is effectively absorbed by the bulb’s black coating.
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