A student investigates how the colour and texture of a surface affect the absorption of infrared radiation.
The student uses three identical metal cans with different outer surfaces. Each can contains 150 cm3 of water at 18 ∘C18\ ^{\circ}\text{C}18 ∘C.
The cans are placed 20 cm from an infrared lamp for 15 minutes.
The Table shows the results.
Table
| Surface of can | Starting temperature in ∘C^{\circ}\text{C}∘C | Final temperature in ∘C^{\circ}\text{C}∘C | Temperature rise in ∘C^{\circ}\text{C}∘C |
|---|---|---|---|
| matt black | 18 | 39 | |
| matt white | 18 | 31 | |
| shiny silver | 18 | 24 |
Complete the Table.
Give the independent variable and the dependent variable in this investigation.
Give two variables, other than the volume of water, that the student kept the same.
Write a conclusion for this investigation.
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.