Electromagnetic spectrum — KCSE Physics
KCSE Physics · 96 practice questions · 9 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Describe the complete electromagnetic spectrum and state properties of EM waves
Describe methods of detecting electromagnetic radiations
Describe applications of EM radiations including greenhouse effect and solve problems involving c=fλ
Arrange EM radiations in order of increasing/decreasing frequency, wavelength or energy
State common properties of all EM waves and distinguish EM waves from mechanical waves
Apply c = fλ and E = hf to calculate wavelength, frequency, speed and photon energy of EM waves
State detection methods for each region of the EM spectrum
State applications of each type of EM radiation in everyday life and technology
Compare production of X-rays and gamma rays; distinguish hard and soft X-rays; state hazards and shielding
Sample Questions
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List two methods for producing X-rays and two methods for producing gamma rays. (4 marks)
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State two applications of infrared radiation in everyday life. (2 marks)
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Identify a detection method for each of the following regions of the electromagnetic spectrum: (a) microwaves (1 mark) (b) visible light (1 mark) (c) infrared (1 mark) (d) gamma rays (1 mark)
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Why Practise Electromagnetic spectrum?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
Detailed Marking Schemes
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