A red-painted metal panel is illuminated using only blue light. An observer says that the panel appears almost black.
Which explanation accounts for the panel's appearance?
The panel absorbs most of the blue light, and there are no red wavelengths for it to reflect.
The blue light has a shorter wavelength than red light, so it is too dim for the observer to see.
The panel changes the blue light into red light, but the red light is too weak for the observer to see.
The panel reflects the blue light, but the blue light mixes with the red paint to make black.
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.