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An endoscope uses glass fibres to enable doctors to ‘see’ inside a person - Edexcel - GCSE Physics - Question 5 - 2015 - Paper 1
Question 5
An endoscope uses glass fibres to enable doctors to ‘see’ inside a person. Complete the sentence by putting a cross (X) in the box next to your answer. Rays of lig... show full transcript
Worked Solution & Example Answer:An endoscope uses glass fibres to enable doctors to ‘see’ inside a person - Edexcel - GCSE Physics - Question 5 - 2015 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
The correct choice is C total internal reflection. This phenomenon occurs when light traveling within a medium hits the boundary at an angle greater than the critical angle, causing it to be completely reflected back into the medium.
Step 2
Complete the diagram to show the path of the ray of light inside the glass block.
Answer
To complete the diagram, draw a line representing the path of the ray of light as it enters the semicircular glass block at a specific angle. Ensure that the angle of incidence is greater than the critical angle for total internal reflection to occur. After hitting the boundary, direct the line back inside the glass block at the same angle (angle of reflection). Additionally, illustrate the continuation of the ray as it reflects within the block, exiting either through the flat edge or re-entering the ray box.