In figure, the optical fiber is `I=2m` long and has a diameter of `d=20 mum`. If a ray of light is incidnet on one end of the fiber at angle `0_(1)=40^(@)C`, the number of reflections if makes before emerging from the other and is close to:
(refractive index of fiber is `1.31` and `sin40^(@)=0.64`)
In figure, the optical fiber is `I=2m` long and has a diameter of `d=20 mum`. If a ray of light is incidnet on one end of the fiber at angle `0_(1)=40^(@)C`, the number of reflections if makes before emerging from the other and is close to:
(refractive index of fiber is `1.31` and `sin40^(@)=0.64`)
(refractive index of fiber is `1.31` and `sin40^(@)=0.64`)
A
`55000`
B
`66000`
C
`45000`
D
`57000`
Text Solution
Verified by Experts
The correct Answer is:
B
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