The optical phenomenon that is responsible for the propagation of light signal through an optical fibre is

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Q: 1 (CAPF/2018)
The optical phenomenon that is responsible for the propagation of light signal through an optical fibre is

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,185,39,14,19,185,6

keywords: 

{'optical fibre': [0, 1, 0, 3], 'optical phenomenon': [0, 0, 0, 1], 'light signal': [0, 0, 0, 1], 'total internal reflection': [0, 1, 2, 1], 'refraction': [0, 0, 1, 0], 'propagation': [2, 0, 0, 5], 'interference': [0, 2, 1, 5]}