The signals through fibre-optics are transmitted by 

(A) Light wave 

(B) Electric wave  

(C) Sound wave 

(D) Magnetic wave 

Correct Ans: (A)

Explanation:

Fiber-optic communication uses light waves to transmit signals. In this technology, data gets converted into light signals and travels through thin strands of glass or plastic fiber. The light pulses move through the fiber-optic cables, reflecting off the internal walls of the fiber, maintaining the signal’s integrity over long distances.

Using light waves in fiber optics offers several advantages over traditional copper cables. Light signals travel faster and with less signal loss, enabling higher data transmission rates. Additionally, fiber-optic cables resist electromagnetic interference, making them more reliable in various environments.

Lasers or light-emitting diodes (LEDs) typically generate the light waves used in fiber-optic transmission. These light pulses carry digital data, which the receiver decodes and converts back into electronic signals.

In conclusion, fiber-optic signals transmit through light waves, offering faster, more reliable communication with minimal interference. This technology plays a crucial role in modern telecommunications, enabling high-speed internet, television, and phone services.