UNIT OVERVIEW

This revision unit brings together the three main topics from Term 4: mechanical energy, longitudinal waves (sound), and electromagnetic radiation. These concepts explain how energy moves and transforms in the physical world.

What you will revise:

• Gravitational potential energy and kinetic energy
• Conservation of mechanical energy
• Longitudinal waves and sound
• The electromagnetic spectrum and photon energy

By the end of this unit, you will be able to:

• Apply energy formulas to solve problems
• Calculate wave properties (frequency, wavelength, speed, period)
• Calculate photon energy from frequency or wavelength
• Identify common exam mistakes and avoid them
• Answer mixed and exam-style questions with confidence

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