Explain how you would identify sources of uncertainty when tracing rays through transparent blocks. in the context of Waves in air, fluids and solids.

A strong answer should clearly identify sources of uncertainty when tracing rays through transparent blocks. using accurate physics vocabulary and direct links to Reflection and refraction of waves.

This exam-style question is aligned to the approved learning objective for Reflection and refraction of waves and expects a structured physical explanation rather than a single fact.