Lenses can be used to help people see clearly.
a.[2]
Complete the ray diagram for part (a) to show how the light rays travel through and emerge from this model convex lens (glass prisms and glass block).
b.[2]
Explain how a convex lens can correct long-sighted vision. Use the model to help you.
c.[3]
A student looks at red paper in different coloured light. She looks at the red paper with red light. The paper appears red. What colour does the red paper appear in green light? Explain your answer.