## Listing all results (311)

### Episode 309: Generating Waves

From the Institute of Physics, this learning episode introduces the idea that vibrations can give rise to disturbances travelling outwards, i.e. to progressive waves. This illustrates some of the basic properties of waves. The activities include: • investigating transverse and longitudinal waves in a spring •...
Publication date:
2000 - 2009

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### Episode 311: Speed, Frequency and Wavelength

These activities, from the Institute of Physics, consider how speed, frequency and wavelength are linked by the wave equation v = fλ . This is achieved by measuring frequency using an oscilloscope and measuring the velocity of sound in free air. The activities include: * worked example to deduce and use the wave...
Publication date:
2000 - 2009

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### Episode 313: Polarisation

This learning episode, from the Institute of Physics, help students to develop their idea of electromagnetic radiation and polarisation. The basic ideas are developed through demonstrations and experiments. The approach is non-mathematical. The activities include: * using polarising filters to observe...
Publication date:
2000 - 2009

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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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