| Lesson 12 - The inverse square law | Previous Lesson
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| Objective | ||
| In this lesson, the concept of the inverse square law is presented through a student-designed investigation. The lesson is introduced by recalling what happens when light is reflected from a convex surface (Lesson 9) placed in historical context by referring to Kepler again (ref Lesson 11). The lesson concludes with a discussion about the implications for communications. This provides a bridge to the next lesson on radio and television. | ||
| Prescribed Focus Area | Skills Development | Content |
P1 A student outlines the historical development of major principles, concepts and ideas in physics. |
P11.1 Students identify data sources |
D3.4 Students learn to explain that the relationship between the intensity of electromagnetic radiation and distance from a source (for large distance) is an example of the inverse square law D3.6 … discuss problems produced by the limited range of the electromagnetic spectrum available for communication purposes |
| Activity | Resources | Homework |
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A3.1 Students plan, choose equipment or resources for and perform a first-hand investigation and gather information to model the inverse square law for light intensity and distance from the source |
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| Management issues | Nominal duration | |
| This lesson would be delivered over several periods beginning with the planning and performance of the investigation followed by a discussion of the social implications. | 3 hours |
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