A museum display has three opaque panels: a red panel, a white panel and a blue panel. The panels are lit by a lamp that produces only red light and blue light. An observer views the panels through a blue filter.
Give the colour of the white panel seen through the blue filter.
Give the colour of the blue panel seen through the blue filter.
Explain your answers to (a) and (b).
A visitor predicts that the red panel will look red through the blue filter.
Explain whether the visitor is correct.
93 exam-style questions on Edexcel GCSE Physics 5.1 Reflection, refraction and lenses, covering 5.1.1 Reflection, refraction and total internal reflection, 5.1.2 Specular and diffuse reflection, 5.1.3 Colour of light: absorption and filters, 5.1.4 Lenses: power, focal length and shape, 5.1.5 Ray diagrams for converging and diverging lenses, and 5.1.6 Real and virtual images. Each one has a worked solution and a mark scheme showing where the marks go.