Physics
For obtaining the spectrum of ultraviolet radiation, the material of prism should be :
- glass
- quartz
- rock salt
- does not matter
Spectrum
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Answer
quartz
Reason — For obtaining the spectrum of ultraviolet radiation, the material of prism should be quartz as they are absorbed by glass.
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The source of ultraviolet light is —
- electric bulb
- red hot iron ball
- sodium vapour lamp
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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 —
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For obtaining the spectrum of infrared radiation, the material of prism should be :
- glass
- quartz
- rock salt
- does not matter