Topic study hub
Electromagnetic spectrum
Identify the primary sections of the electromagnetic spectrum (radio, microwave, infrared, visible light, ultraviolet, X-ray, gamma rays) arranged by frequency and wavelength.
5
Objectives
50
Flashcards
35
Questions
90 min
Study time
CambridgeIGCSECombined ScienceWaves
Choose a revision tool
Start revising Electromagnetic spectrum
Syllabus checklist
What you need to know
5 objective pages available
Electromagnetic spectrum outcomes5 objectives
- Identify the primary sections of the electromagnetic spectrum (radio, microwave, infrared, visible light, ultraviolet, X-ray, gamma rays) arranged by frequency and wavelength.
- Understand that all types of electromagnetic waves move at the same high speed in a vacuum and nearly the same speed in air.
- Recognize various uses of different parts of the electromagnetic spectrum, such as: (a) radio waves for radio and TV broadcasts, radar; (b) microwaves for satellite TV, mobile phones, and microwave ovens; (c) infrared for TV remote controls and thermal imaging; (d) visible light for seeing and photography; (e) ultraviolet for identifying counterfeit banknotes; (f) X-rays for medical imaging and security checks; (g) gamma rays for cancer detection and treatment.
- Explain the negative impacts of excessive exposure to electromagnetic radiation on humans, including: (a) ultraviolet radiation causing skin cell damage and eye issues, potentially leading to skin cancer and eye conditions; (b) X-rays and gamma rays causing mutations or damage to body cells.
- Recognize that the speed of electromagnetic waves in a vacuum is 3.0 × 10^8 meters per second.
Key terms
IdentifyDescribeExplainStateDiscussEvaluateGive
Exam tips
No exam tips are published for this topic yet.
Common mistakes
No common mistakes are published for this topic yet.
Practice preview
Continue by objective
Objectives are grouped by subtopic so students can jump straight to the exact skill they want to revise.