White light is made of different colours: red, orange, yellow, green, blue, indigo, and violet.
White light passes through a transparent filter A. Filter A absorbs red, orange, yellow, and green light.
What colours of light are transmitted by filter A?
The light that leaves filter A then passes through another transparent filter B. The light that leaves filter B is blue light. What colours of light are absorbed by filter B?
An object is painted blue.
When certain coloured lights shine on it, the blue object appears black. Explain why.
Suggest two different colours of light that would cause the blue object to appear black.
11 exam-style questions on OCR GCSE Physics Wave interactions. Each one has a worked solution and a mark scheme showing where the marks go.