Converging light rays are light rays that are moving towards each other and eventually meet at a single point.
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Light bending away from its original path instead of returning towards the observer is known as refraction. Refraction occurs when light travels through different mediums with varying optical densities, causing its path to change direction.
If redshifted light were to move in the opposite direction (i.e., towards an observer), it would appear blueshifted. This means that the wavelength of the light would decrease, causing it to shift towards the blue end of the spectrum. Blueshift occurs when an object is moving towards an observer, while redshift occurs when an object is moving away.
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Communicating with light through the use of light signals or pulses is called optical communication. This technology is commonly used in fiber-optic networking and wireless communication systems.
Light travels in straight lines that we call rays.