Identity the correct statements in the following.

(A) Optical fibres consist of a core and cladding
(B) Optical fibres are fabricated such that light reflected at one side of the inner surface strikes the other at an angle smaller than the critical angle.
(C) Optical fibres make use of the phenomenon of total internal reflection.
(D) Optical fibres can be used as an optical pipe

Choose the correct answer from the options given below:

(A), (C) and (D) only

The correct answer is Option (2) → (A), (C) and (D) only

Correct statements: (A), (C), and (D)

Explanation:

(A) True — Optical fibres are made of a core (higher refractive index) and cladding (lower refractive index).

(B) False — For total internal reflection to occur, the light must strike the core-cladding interface at an angle greater than the critical angle, not smaller.

(C) True — Optical fibres work on the principle of total internal reflection.

(D) True — Optical fibres can act as light pipes for transmitting light efficiently through curves.