Data Sheet of Experiment 1
Properties
of Thermal Radiation - Data Sheets
I. Verification
of Stefan-Boltzman Law
Tref (Room Temperature) = _____________ K
Rref (Filament Resistence at Tref ) = _____________ W
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DATA |
CALCULATIONS |
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|
V |
I |
Rad. Meter |
R |
Tfilament |
T4 |
|
(Volts) |
(Amps) |
(mV) |
(W) |
(K) |
(K) |
|
1 |
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2 |
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3 |
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4 |
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5 |
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6 |
|
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7 |
|
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8 |
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9 |
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10 |
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11 |
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Table
1
Radiation sensor reading at (V=) 3 volts = _____________ mV
Radiation sensor reading at (V=) 10 volts = _____________ mV
II. Radiation
Intensity as a Function of Distance
|
X (cm) |
Ambient Radiation Level (mV) |
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
10 |
|
|
20 |
|
|
30 |
|
|
40 |
|
|
50 |
|
|
60 |
|
|
70 |
|
|
80 |
|
|
90 |
|
|
100 |
|
Table
2.
|
X (cm) |
Radiation Level (mV) |
Net Radiation (mV) Radiation - Ambient |
|
2 |
|
|
|
3 |
|
|
|
4 |
|
|
|
5 |
|
|
|
10 |
|
|
|
20 |
|
|
|
30 |
|
|
|
40 |
|
|
|
50 |
|
|
|
60 |
|
|
|
70 |
|
|
|
80 |
|
|
|
90 |
|
|
|
100 |
|
|
Table
3
III.
Emissivity of Various Surfaces
Power Setting |
5.0 |
Power Setting |
6.5 |
Therm .Res. |
|
Therm .Res |
|
Temperature |
|
Temperature |
|
Surface |
Sensor Reading |
Surface |
Sensor Reading |
Black |
|
Black |
|
White |
|
White |
|
Polished Aluminum |
|
Polished Aluminum |
|
Dull Aluminum |
|
Dull Aluminum |
|
Power Setting |
8.0 |
Power Setting |
10.0 |
Therm .Res. |
|
Therm .Res |
|
Temperature |
|
Temperature |
|
Surface |
Sensor Reading |
Surface |
Sensor Reading |
Black |
|
Black |
|
White |
|
White |
|
Polished Aluminum |
|
Polished Aluminum |
|
Dull Aluminum |
|
Dull Aluminum |
|