White light is composed of the visible spectrum: red, orange, yellow, green, blue, indigo, and violet.
A beam of white light passes through a transparent filter X. Filter X absorbs blue, indigo, and violet light.
What colours of light are transmitted by filter X?
The light that leaves filter X then passes through another transparent filter Y. The light that leaves filter Y is orange light. What colours of light are absorbed by filter Y?
A stage costume is dyed red.
When certain coloured spotlights shine on it, the red costume appears black. Explain why this occurs in terms of reflection and absorption.
Suggest two different colours of light that would cause the red costume to appear black.