Electromagnetic Spectrum Quiz
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5 questions, one answer each
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1. Which of the following electromagnetic waves has the highest frequency?
- A. Radio waves
- B. Microwaves
- C. Gamma rays
- D. Infrared radiation
2. What is the approximate speed of electromagnetic waves in a vacuum?
- A. 3.0 × 10⁶ m/s
- B. 3.0 × 10⁸ m/s
- C. 3.0 × 10¹⁰ m/s
- D. 3.0 × 10¹² m/s
3. Which region of the electromagnetic spectrum is most suitable for transmitting signals through optical fibres for high-speed broadband?
- A. Radio waves
- B. Microwaves
- C. Visible light or infrared
- D. Ultraviolet
4. A mobile phone user is exposed to excessive microwave radiation. What is the primary harmful effect described in the specification?
- A. Damage to surface cells and increased risk of skin cancer
- B. Mutation or damage to cells throughout the body
- C. Internal heating of body cells
- D. Damage to the eyes and cornea
5. A communications company is choosing between using digital signalling and analogue signalling for a new long-distance network. Which two key advantages would digital signalling provide?
- A. Lower cost and easier equipment installation
- B. Increased rate of data transmission and increased range due to accurate signal regeneration
- C. Better sound quality and improved visual clarity
- D. Smaller signal frequencies and longer wavelengths