Which statement is not correct?
Blue light travels faster in a vacuum than red light because it has a higher frequency.
The speed of radio waves in air is approximately 3.0×108 m/s3.0 \times 10^8\text{ m/s}3.0×108 m/s.
Gamma rays and visible light emitted simultaneously by a distant star travel through space and reach a detector at the same time.
The speed of infrared radiation in a vacuum is 3.0×105 km/s3.0 \times 10^5\text{ km/s}3.0×105 km/s.
198 exam-style questions on CIE IGCSE Physics Electromagnetic spectrum, covering Electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.