Visible light has wavelengths from about 400 nm400\ \text{nm}400 nm to 700 nm700\ \text{nm}700 nm.
An electromagnetic wave has a wavelength of 950 nm950\ \text{nm}950 nm.
Which statement about this wave is correct?
It is infrared, and the human eye cannot detect it
It is ultraviolet, and the human eye cannot detect it
It is red light, and the human eye can detect it
It is infrared, and the human eye sees it as red
48 exam-style questions on OCR GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves in space, 5.2.2 Energy transfer by electromagnetic waves, 5.2.3 Frequency and wavelength across the spectrum, 5.2.4 Groups of the electromagnetic spectrum, 5.2.5 Visible light and the limits of human sight, 5.2.6 Light as an electromagnetic wave, 5.2.7 Uses of electromagnetic waves, 5.2.8 Hazards of ultraviolet, X-rays and gamma rays, 5.2.9 Ultrasound and imaging inside the body, and 5.2.10 Radio waves and oscillating circuits. Each one has a worked solution and a mark scheme showing where the marks go.