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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'...

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...

Episode 320: Superposition

This learning episode, from the Institute of Physics, introduces the basic idea of superposition of waves, explaining what happens when two or more waves meet.

The activities include:
• recapping students’ knowledge and understanding of waves
• demonstration of waves using a rope
•...

Episode 321: Interference Patterns

This learning episode from the Institute of Physics covers the constructive and destructive interference of waves.

Through discussion, student experiments and teacher demonstrations, students look at:
* simple interference of waves
* waves from two sound sources
* demonstration of Young's...

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...

Episode 323: Diffraction

In this learning episode, from the Institute of Physics, students observe diffraction using a ripple tank or laser.

The activities include:
* simple ways to observe diffraction
* demonstration of diffraction using a ripple tank or laser
* deriving the formula for minima in the diffraction...

Episode 324: Stationary or Standing Waves

In this learning episode, from the Institute of Physics, students look at standing waves in musical instruments and measure their wavelength. Microwaves are used to estimate the speed of light.

The activities include:
* demonstrating waves in a rope
* how superposition results in standing waves...

Episode 408: Field Strength and Potential Energy

This learning episode, from the Institute of Physics, introduces field strength and potential energy for electric fields. Comparisons with gravitational fields are also made.

The activities include:
* discussion of field strength
* worked examples on field strength
* discussion about...

Episode 411: Describing Magnetic Fields

Produced by the Institute of Physics, this learning episode uses demonstrations, experiments and questions to help students learn about electromagnetic fields. These consider their strength and direction.

The activities include:
• demonstrating the field around a permanent magnet
• field...

Episode 412: Force on a Conductor in a Magnetic Field

In this learning episode, from the Institute of Physics, students look at how a magnetic field can be quantified by measuring the force on a conductor. It illustrates how Flemming's left hand rule can be used to find the direction of the force. The activities include: 

  • investigating the relationship...

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