Which of the following is/are application(s) of optical fibres?

All of these

Optical fibre: Light is propagated along the axis of fibre through multiple total internal reflection, even though the fibre is curved, without loss of energy.

Applications:

1. For transmitting optical signals and the two-dimensional pictures.

2. For transmitting electrical signals by first converting them to light.

3. For visualizing the internal sites of the body by doctors in endoscopy.