Four opaque fabric samples appear red, green, white and black when viewed in white light. A white lamp is now shone through a green filter onto the samples. Assume that the red and green samples reflect only their own colours.
Which fabric changes from its stated colour in white light to appear very dark?
The white fabric sample
The black fabric sample
The red fabric sample
The green fabric sample
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.