A detector on a space probe records two electromagnetic waves, P and Q, travelling through a vacuum.
| Wave | Frequency |
|---|---|
| P | 6.0 × 1014 Hz |
| Q | 1.5 × 1016 Hz |
All electromagnetic waves travel through a vacuum at 3.0 × 108 m s-1.
The table gives the wavelength ranges of two groups of the electromagnetic spectrum.
| Electromagnetic group | Wavelength range |
|---|---|
| visible light | 4.0 × 10-7 m to 7.0 × 10-7 m |
| X-rays | 1.0 × 10-11 m to 1.0 × 10-8 m |
Which statement gives the wavelength and electromagnetic group of each wave?
P has a wavelength of 5.0×10−7 m5.0 \times 10^{-7}\,\text{m}5.0×10−7m and is visible light; Q has a wavelength of 2.0×10−8 m2.0 \times 10^{-8}\,\text{m}2.0×10−8m and is infrared.
P has a wavelength of 5.0×10−6 m5.0 \times 10^{-6}\,\text{m}5.0×10−6m and is infrared; Q has a wavelength of 2.0×10−7 m2.0 \times 10^{-7}\,\text{m}2.0×10−7m and is ultraviolet.
P has a wavelength of 2.0×10−8 m2.0 \times 10^{-8}\,\text{m}2.0×10−8m and is ultraviolet; Q has a wavelength of 5.0×10−7 m5.0 \times 10^{-7}\,\text{m}5.0×10−7m and is visible light.
P has a wavelength of 5.0×10−7 m5.0 \times 10^{-7}\,\text{m}5.0×10−7m and is visible light; Q has a wavelength of 2.0×10−8 m2.0 \times 10^{-8}\,\text{m}2.0×10−8m and is ultraviolet.
84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.