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Paper 6Alternative to PracticalPractical1 marks
An experiment is conducted to compare the effectiveness of different materials in absorbing infrared radiation.
Method
Method for Testing Infrared Absorption
Different materials are placed at equal distances from an infrared lamp. The temperature of each material is measured after a set time of exposure to the lamp.
| Material | Initial Temperature (°C) | Final Temperature (°C) |
|---|---|---|
| Black paper | 20 | 45 |
| White paper | 20 | 30 |
| Aluminum foil | 20 | 25 |
| Glass | 20 | 22 |
- a[1]
Identify Identify the independent variable in this experiment.
Aim for approximately 1 distinct marking point.
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