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Episode 314: Electromagnetic Radiation

In this learning episode from the Institute of Physics, through a demonstration and the production of a presentation, students extend their understanding of the nature of different types of electromagnetic radiation, and considers their shared nature. The activities look at: • using heat detector and fluorescent...
Publication date:
2000 - 2009

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Episode 315: The Inverse Square Law

In this learning episode, produced by the Institute of Physics, students investigate how the intensity of radiation decreases with distance from the source. The activities include: * demonstration and discussion on how radiation spreads * worked example to illustrate thinking in proportions * experiment to...
Publication date:
2000 - 2009

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Episode 317: Reflection and Refraction of Waves

This learning episode, from the Institute of Physics, contains activities in which students look at reflection, refraction and Snell's law. Through discussion, demonstration and practical experiments, students look at: * reflection and refraction with a ripple tank * the 'marching soldiers' model of refraction...
Publication date:
2000 - 2009

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Episode 318: Total Internal Reflection

Produced by the Institute of Physics, this learning episode helps students to observe total internal reflection (TIR) as a consequence of refraction. Students use a semi-circular block to observe TIR and see how a fibre optic can be used to transmit information. The activities include: * ray tracing using...
Publication date:
2000 - 2009

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Episode 322: Diffraction Gratings

In this learning episode, from the Institute of Physics, students look at different light sources through diffraction gratings. Using this system, students measure the wavelength of a laser and derive the grating formula. The activities include: * looking through gratings * deriving the grating formula *...
Publication date:
2000 - 2009

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Episode 104: Drift Velocity

From the Institute of Physics, this learning episode shows that charge carriers in good conductors usually move very slowly. It illustrates the derivation and use of the equation I = nAvq. A range of activities include: • viewing the movement of permanganate ions in an electric field • estimating the drift...
Publication date:
2000 - 2009

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Episode 107: Preparation for Resistance Topic

This series of activities, from the Institute of Physics, help student to understand electrical resistance. What is resistance, how it can be measured, how it arises and what affects it? During the topic, resistance is related to current, voltage, type of material, temperature and light intensity. The electrical...
Publication date:
2000 - 2009

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Episode 108: Resistance

From the Institute of Physics, this learning episode provides a quantitative definition for resistance (R = V / I) which reinforces the qualitative notion that more resistance means less current. It looks at Ohm’s law, describing that this is not the same thing as the definition of resistance. Activities include...
Publication date:
2000 - 2009

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Episode 109: Electrical Characteristics

Produced by the Institute of Physics, in this practical investigation students measure the current and voltage characteristics for several components and identify ohmic and non-ohmic behaviour. Students determine the V-I characteristics for: • a carbon resistor • semiconductor diode • a filament lamp In...
Publication date:
2000 - 2009

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Episode 121: Electromotive Force and Internal Resistance

In this learning episode, from the Institute of Physics, students derive the equation relating electromotive force (emf), terminal potential difference, current and internal resistance. They then tackle questions about the internal resistance of a power supply.The activities include:• deriving the equation relating...
Publication date:
2000 - 2009

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