OCR GCSE Physics A · J249
Specification P7.2f · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Reducing unwanted transferA thermogram shows differences in surface temperature using infrared radiation. Examining one of a heated house can help identify unusually warm external areas worth investigating as possible routes of energy loss. It does not, by itself, prove exactly how energy is being transferred or which improvement is needed.