Technical Sciences Grade 12 · NSC September 2025 P1 (Eastern Cape) · Question 7.1.1
Define electromagnetic wave.
About this question
Question 7.1.1 of Technical Sciences Grade 12 Paper 1, NSC Preparatory Examination (Eastern Cape DoE, September 2025). It tests the Term 2 ATP topic Electromagnetic Radiation The EM spectrum, photons (E=hf), and their uses.
- TermTerm 2
- ATP topicElectromagnetic Radiation The EM spectrum, photons (E=hf), and their uses
- PaperPaper 1
- Marks2 marks
Answer
2 marksAn electromagnetic wave is a changing electric field and magnetic field that are perpendicular to each other and to the direction in which the wave travels.
Study this in your textbook: CAPS Annual Teaching Plan, Grade 12, Term 2: Hydraulics, Organic Chemistry & Waves.
More Questions On Electromagnetic Radiation The EM spectrum, photons (E=hf), and their uses
Answer
\[ E = \frac{hc}{\lambda} \]\[ 1{,}989 \times 10^{-17} = \frac{(6{,}63 \times 10^{-34})(3 \times 10^{8})}{\lambda} \]
Full answer and marking tips
\( \lambda = 1{,}0 \times 10^{-8}\ \text{m} \)
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Two uses of X-rays are:
- Radiography, to see inside the body, for example to check for broken bones.
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