501 prompts matching "Background radiation, and allowing for it"
Let me explain: Constructing ray diagrams for a converging lens
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Physics at work: Optometry and imaging
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Practice set: Problems on vibrating strings and air columns
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Exam timing: A timed capacitor problem set
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Practice set: Series and parallel resistance problems
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Let me explain: Power dissipation and why cables warm
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Worked example: The cost of running an appliance for a stated period
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Practice set: Power and energy problems across appliances
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Exam timing: A timed energy and power problem set
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Physics at work: Energy auditing
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Let me explain: Self and mutual inductance
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Practice set: Induced e.m.f. problems for moving conductors
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Real-life Nigeria: Step-down transformers on Nigerian distribution poles
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Practice set: Problems on magnetisation and demagnetisation
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Let me explain: The discharge tube and the effect of pressure
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Let me explain: The structure of a fibre: core, cladding and coating
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Practice set: Problems on signal loss and fibre geometry
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Practice set: Problems on laser output and photon count
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Physics at work: Laser and photonics work
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Let me explain: Checking an equation for dimensional consistency
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