Industrial testing facilities utilize various types of radiation for non-destructive imaging and materials analysis.
The table lists some types of radiation. Complete the table by putting a tick (✓\checkmark✓) in each row to show which types of radiation are ionising and which are non-ionising. One has been done for you.
| Radiation | Ionising | Non-ionising |
|---|---|---|
| beta | ✓\checkmark✓ | |
| alpha | ||
| visible light | ||
| radio waves |
State two safety precautions that industrial radiographers working with high-activity gamma-ray sources should take to minimise their occupational radiation dose.