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MYP Physics · 11 · extended response

Light trapped in a fibre

Light and optics · Original GioPhysics question with a detailed, mark-by-mark answer guide.

Demand
demanding
Marks
6
Topics
1
Answer
Complete
Question6 marks

Explain how total internal reflection guides light along an optical fibre and state the two conditions required at each reflection.

Task interpretation

What a complete response should do

Organise the response into a logical argument, linking the physics principle to the evidence and conclusion.

Split the problem into linked stages and state why each relationship applies.

Response type
extended response
Allocation
6 marks
Demand
demanding
Ready to check?Reveal answer and worked solution

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How did this one feel?

Use your answer and the marking steps—not confidence alone—to choose.