A food factory uses X-rays to check packs of processed meat for bone fragments. An X-ray detector behind each sample records the number of X-rays reaching it each second. Each sample has the same total thickness and is tested using the same X-ray source.
| Sample | Detector reading / counts per second |
|---|---|
| Reference sample containing meat only | 920 |
| Reference sample containing meat and a bone fragment | 310 |
| Pack P | 880 |
| Pack Q | 340 |
Using the data, explain which pack should be rejected because it is likely to contain a bone fragment.
93 exam-style questions on AQA GCSE Physics 6.2 Electromagnetic waves, covering 6.2.1 Types of electromagnetic waves, 6.2.2 Properties of electromagnetic waves 1, 6.2.3 Properties of electromagnetic waves 2, 6.2.4 Uses and applications of electromagnetic waves, 6.2.5 Lenses, and 6.2.6 Visible light. Each one has a worked solution and a mark scheme showing where the marks go.