A3 Uses of electromagnetic waves in communication: Pearson BTEC National Applied Science (AAQ) Questions

Practise a3 uses of electromagnetic waves in communication with Pearson BTEC National Applied Science (AAQ) questions and mark schemes. Revise A3.1 All electromagnetic waves travel at the speed of light in a vacuum, A3.2 Use the inverse square law in relation to the intensity of a wave: 𝐼𝐼 = 𝑘𝑘 𝑟𝑟2, A3.3 Regions of electromagnetic spectrum overlap and have different frequencies and wavelengths.

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What to revise

• A3.1 All electromagnetic waves travel at the speed of light in a vacuum
• A3.2 Use the inverse square law in relation to the intensity of a wave: 𝐼𝐼 = 𝑘𝑘 𝑟𝑟2
• A3.3 Regions of electromagnetic spectrum overlap and have different frequencies and wavelengths
• A3.3.1 using electromagnetic waves and frequencies in communication applications, to include

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