Observation

Few candidates failed to realize that optical fibres are wrapped in bundles so as to transmit light in and out of a confined space. Also, candidates failed to recognize the fact that “Total Internal Reflection” as a phenomenon by which light is transmitted. Performance was below average.

 The expected answer is as stated below:

            (a)        Reason for wrapping optical fibres in bundles

                        To carry light into or out of a confined space

            (b)        Optical phenomenon by which optical fibre transmits light along its axis