reflection refraction diffraction absorption
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Sam looks into a fish pond and points at a goldfish. Sam's grandfather looks where Sam is pointing and tells Sam that the fish is actually in a different location. Which property of light explains why Sam's grandfather is correct?
Possibilities:
- reflection
- refraction
- diffraction
- absorption

refraction