CIE iGCSE Co-Ordinated Science P3.2.2 Refraction of light Exam Style Questions Paper 1
Question
Light from an underwater lamp is refracted at the surface of water.
Which labelled angle is the angle of refraction of the light?
▶️Answer/Explanation
Ans: C
Question
A ray of light enters a parallel-sided glass block.
At which labelled point does the ray leave the block?
▶️Answer/Explanation
Ans : B
Question
The diagram shows a ray of light passing from glass into air.
Two angles P and Q are labelled.
What is the angle of refraction?
(A) P (B) Q (C) 90° – P (D) 90° – Q
▶Answer/Explanation
Ans : D
Question
A student places four identical beakers on a bench.
Two beakers contain salt water of density 1.1 g/cm3 and two beakers contain pure water of density 1.0 g/cm3. The quantity of water in each beaker is shown.
Which beaker exerts the greatest pressure on the bench?
▶️Answer/Explanation
Ans: A
Question
The diagram shows a ray of light travelling from glass into air.
Which labelled arrow shows the path of the light in the air?
▶️Answer/Explanation
Ans: D
Question
Light travelling in air strikes the surface of water and is refracted. In which labelled direction is the light refracted?
▶️Answer/Explanation
Answer: C. C
Explanation: When light travels from air (less dense) into water (more dense), it bends towards the normal (an imaginary line perpendicular to the surface). Direction C represents this refraction.
Question
Light passes from air through a solid glass block. Which diagram shows the path of the light?
▶️Answer/Explanation
Answer: A. Diagram A
Explanation: When light passes from air into a glass block, it bends towards the normal (refraction). When it exits the glass block, it bends away from the normal. Diagram A correctly shows this path.