The chart lists some electromagnetic radiations:
| radio | microwave | infrared | visible light | ultraviolet | x-ray | gamma |
Complete the table by giving one radiation from the chart for each use.
You may give each type of radiation once, more than once, or not at all.
| Use for radiation | Type of radiation |
|---|---|
| Remote controls | |
| Satellite communications | |
| Sterilising medical equipment |
In a vacuum, all types of electromagnetic radiation travel with
Johann Ritter was a scientist who investigated ultraviolet radiation.
He passed electromagnetic radiation from the Sun through a triangular glass prism. The prism refracted different radiations by different amounts.
The paths of red and blue visible light rays are shown in the diagram.
Explain how the path of an ultraviolet ray as it passes through and exits the prism compares to the paths of the red and blue light rays.
In another experiment, a student wants to maximize the absorption of thermal (infrared) radiation by a physics detector. Which surface finish on the detector would work best?
