4. Which two properties of light are used in optical fiber technology? vibretion and transparency holography and polarization transparency and refraction refraction and reflection

The correct answer is: refraction and reflection.<br /><br />Optical fiber technology utilizes the properties of refraction and reflection to transmit data. Light signals are transmitted through the optical fiber by taking advantage of the principle of total internal reflection. This occurs when light traveling within the fiber hits the boundary of the core-cladding interface at an angle greater than the critical angle, causing it to be completely reflected back into the core. This allows the light to travel long distances through the fiber with minimal loss. Additionally, refraction is involved when the light enters the fiber and is bent towards the axis of the fiber.