A flare on a distant star gives out an infrared pulse and an ultraviolet pulse at the same instant. Both pulses cross the same distance through the vacuum of space to a space telescope. The wavelength of the infrared pulse is longer than the wavelength of the ultraviolet pulse. Which statement is correct?
The infrared pulse arrives at the telescope first, and the frequency of the ultraviolet pulse is greater.
Both pulses arrive at the telescope together, and the frequency of the ultraviolet pulse is greater.
Both pulses arrive at the telescope together, and the frequency of the infrared pulse is greater.
The ultraviolet pulse arrives at the telescope first, and the frequency of the infrared pulse is greater.
93 exam-style questions on AQA GCSE Physics 6.2 Electromagnetic waves, covering 6.2.1 Types of electromagnetic waves, 6.2.2 Properties of electromagnetic waves 1, 6.2.3 Properties of electromagnetic waves 2, 6.2.4 Uses and applications of electromagnetic waves, 6.2.5 Lenses, and 6.2.6 Visible light. Each one has a worked solution and a mark scheme showing where the marks go.