A detector records the thermal radiation emitted by a glass blank. The blank then cools.
The table gives four possible records for the cooler blank.
| Record | Total emitted intensity compared with before cooling | Peak wavelength compared with before cooling |
|---|---|---|
| P | lower | longer |
| Q | lower | unchanged |
| R | unchanged | longer |
| S | higher | shorter |
Which record is consistent with the glass blank being cooler?
Record Q
Record S
Record R
Record P
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.