A student investigates the emission of infrared radiation from different surfaces using a metal Leslie's cube.
The cube is filled with boiling water so that all four vertical faces are at the same temperature.
An infrared detector connected to a millivoltmeter is used to measure the intensity of the radiation emitted from each of the four surfaces. The detector is kept at the same distance from the cube for each measurement.
The table shows the results of the experiment for three of the surfaces.
| Surface finish | Infrared detector reading (mV) |
|---|---|
| Matt black | 72 |
| Shiny black | |
| Matt white | 41 |
| Shiny white | 15 |
Suggest a possible millivoltmeter reading for the shiny black surface.