How Light Travels - Objectives Labels

In Lesson 6.6 titled 'How Light Travels', students will delve into the fundamental properties of light and its behaviour. The objectives for the lesson are clear and multi-faceted. Initially, students will acknowledge that light seems to propagate in straight lines. This understanding will be used to rationalise how we perceive objects, whether they emit light themselves or reflect it into our eyes. Furthermore, the lesson will cover the concept that our ability to see is due to light travelling from sources to our eyes, either directly or via reflection off other objects. An interesting aspect of the lesson will be using the straight-line travel principle to explain the phenomenon of shadows, particularly why they replicate the shape of the objects that create them.

To gauge their comprehension, students will be tasked with answering several key questions. They will be asked to demonstrate evidence supporting the concept of light's linear travel. Additionally, they will learn to categorise objects based on whether they emit light (luminous) or do not emit light (non-luminous). Describing the journey light takes to enable our vision will be another critical point of understanding, as will be explaining the relationship between the shape of shadows and the objects casting them. By responding to these questions, students will be able to affirm their grasp of the principles of how light travels and its implications for sight and shadows.