White light passes through an ideal green filter and then falls on an opaque red object. The object reflects only red light. Which explains why the object appears black?
the filter transmits red light, which the object absorbs
the filter transmits green light, which the object absorbs
the filter absorbs green light, which the object reflects
the filter absorbs red light, which the object transmits
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.