Which of the following optical instruments utilizes total internal reflection to transmit high-speed data signals over long distances without significant energy loss?

💡 Solution & Explanation

Optical fibers rely on the principle of total internal reflection to guide light signals through a core surrounded by a cladding of lower refractive index. Other optical devices use refraction and reflection from lenses and mirrors rather than continuous internal confinement. Total internal reflection ensures that light travels through the core with minimal absorption losses.