Q192
Total internal reflection at the fibre wall can occur only if two conditions are met. One of the condition is the glass inside the fibre core must have a/an . . . . . . . . index of refraction than/as the index of refraction of the material surrounding the fibre core.
A.
equal
B.
slightly higher
AnswerC.
slightly smaller
D.
slightly sharper
Answer: Option B
Solution
Answer: Option B
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