Physics
A radiation P is focused by a proper device on the bulb of a thermometer. Mercury in the thermometer shows a rapid increase. The radiation P is —
- infrared radiation
- visible light
- ultraviolet radiation
- X-rays
Spectrum
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Answer
infrared radiation
Reason — Mercury in the thermometer shows a rapid increase due to the heating effect of the radiation. Hence, we can say that the radiation P is the infrared radiation.
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Related Questions
The source of ultraviolet light is —
- electric bulb
- red hot iron ball
- sodium vapour lamp
- carbon arc-lamp
For obtaining the spectrum of ultraviolet radiation, the material of prism should be :
- glass
- quartz
- rock salt
- does not matter
For obtaining the spectrum of infrared radiation, the material of prism should be :
- glass
- quartz
- rock salt
- does not matter
The most energetic electromagnetic radiations are —
- microwaves
- ultraviolet waves
- X-rays
- gamma rays