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Communication Uses of Electromagnetic Waves
Electromagnetic waves are widely used to carry information.
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Communication Uses of Electromagnetic Waves
Recommended for Class 10
Communication Uses of Electromagnetic Waves
Electromagnetic waves are widely used to carry information.
Different frequency bands are chosen depending on:
distance; bandwidth; atmospheric transmission; antenna size; ability to penetrate materials; directionality.
Radio Communication
Radio waves are used in:
broadcasting; long-range communication; * some navigation systems.
Microwave Communication
Microwaves are important for:
satellites; mobile phones; Wi-Fi; radar; * point-to-point links.
Their shorter wavelength allows smaller antennas and more directional beams.
Infrared Communication
Infrared is used in:
remote controls; short-range optical links; * some fibre-optic systems at suitable infrared wavelengths.
Optical Fibre
Optical fibres carry light pulses through glass or plastic fibres.
Advantages include:
high data capacity; low signal loss; * resistance to electromagnetic interference.
Communication Uses of Electromagnetic Waves — Advanced
Common Mistakes
Common Mistakes
- Mistake
Not every communication system uses radio waves.
- Mistake
Visible and infrared light can also carry digital information.
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Practice
PQ
Q1. State radio communication uses.
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Q2. State microwave communication uses.
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Q3. State infrared communication uses.
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Q4. Give fibre-optic advantages.
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Q5. Explain why different bands are chosen.
Exam Practice
EQ
Q1. State radio communication uses.
EQ
Q2. State microwave communication uses.
EQ
Q3. State infrared communication uses.
EQ
Q4. Give fibre-optic advantages.
EQ
Q5. Explain why different bands are chosen.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.