Not only does light travel, it travels in straight lines through a given medium. Various first-hand sources of evidence point...

Physics Narrative 5-11

Suggestions for activities to aid the teaching of 'seeing things' based on the Physics Narrative and the Teaching Guidance.

Classroom Activity 5-11

Seeing is a very significant sense to humans, and some images evoke strong emotional responses. The physicality of the light...

Classroom Activity 5-11