CAIE IGCSE Physics 3.3.6 Speed of Em Waves in a Vacuum Is 3 0 Questions
Practise using 3.0 x 10^8 m s^-1 for electromagnetic waves in vacuum or air, including delay and refractive-index calculations.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- State 3.0 × 10⁸ m/s as electromagnetic-wave speed in vacuum or approximately air, calculate signal delays including round trips, and use refractive index or given data to determine light speed in transparent materials with correct units.
CAIE IGCSE Physics 3.3.6 Speed of Em Waves in a Vacuum Is 3 0 Questions question 1
Fig. 8.1 shows images produced during two different medical scanning procedures.
Fig. 8.1
X-rays are part of the electromagnetic spectrum.
State the speed of X-rays in a vacuum.
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