a) Explain the conditions necessary for total internal reflection of light at the interface between two media. (at least 50 words) b) Describe and explain the structure of an optical fibre. (at Least 70 words)

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a) Explain the conditions necessary for total internal reflection of light at the interface between two
media. (at least 50 words)
b) Describe and explain the structure of an optical fibre. (at Least 70 words)
Completed forms to be made available for external moderation.
c)
Complete the following ray diagrams of optical fibres accurately. Use a ruler and a pencil to show
how the rays are reflected along the fibre. For each diagram, show the positions of the normal lines.
Use a protractor to measure the angles of reflection accurately.
A
00
Transcribed Image Text:a) Explain the conditions necessary for total internal reflection of light at the interface between two media. (at least 50 words) b) Describe and explain the structure of an optical fibre. (at Least 70 words) Completed forms to be made available for external moderation. c) Complete the following ray diagrams of optical fibres accurately. Use a ruler and a pencil to show how the rays are reflected along the fibre. For each diagram, show the positions of the normal lines. Use a protractor to measure the angles of reflection accurately. A 00
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