Question

19. Pick out the correct statements about optical fibres from the
following
si : Optical fibres are used for the transmission of optical
signals only.
S2 : Optical fibres are used for transmitting and receiving
electrical signals.
S3 : The intensity of light signals sent through optical fibres
suffer very small loss.
S4 : Optical fibres effectively employ the principle of
multiple total internal reflections.
S5 : Optical fibres are glass fibres coated with a thin layer
of a material with lower refractive index.
[AMU 1995; DCE 1999, 2000, 01, 02, 03;
CBSE PMT 2001; AIEEE 2002; Kerala PMT 2007;
J & K CET 2008; 12; AMU (Med.) 2010]
(a) S1 and S2
(b) S2 and 53
(c) S3 and 54
(d) S2, S3, S4 and S5
​

Answer 1

a) S1 and S2 is the answer

Answer 2

a is the right answer.

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