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Describe an experiment to demonstrate radiation from different surfaces

Describe an experiment to demonstrate radiation from different surfaces.

Answers

Raphael
Experiment: Radiation from different surfaces

Procedure:
1. Place a Leslie cube on a tripod stand and attach a thermometer on each of the four sides.
2. All thermometers should be at least 5.0 cm form the surface and should read the same temperature.
3. Pour hot water (about 80 oC) until it is full and note the reading of each thermometer after 1 minute.
4. Repeat the above procedure using boiling water (100 oC).
radiation22102018.jpg

Discussion:
The thermometer against the black surface records the highest temperature, followed by the one on the grey side, then the white surface while the polished side recorded the lowest temperature. The readings when the water is boiling were higher, indicating that radiation depends on temperature. It also depends on the nature of surface.
raphael answered the question on October 11, 2018 at 05:43

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