That's completely unrelated. Light usually slows down when passing through ANY matter. It does not react with dark matter (which is what makes the "dark matter" invisible in the first place), except through the gravitational interaction. The "cosmic speed limit" is a limit on how fast ANYTHING can travel (matter, energy, or information); it is just conventional to call it the "speed of light". This speed limit is for a vacuum - the assumption is NO normal matter, and NO dark matter; the presence of any matter may slow light down slightly.
Transmission
A compressional wave transports energy through matter by causing particles in the medium to bump into each other, passing on the energy from one particle to the next. This results in a chain reaction of vibrations propagating through the medium, carrying the energy with it.
sublimation
momentum
Dark matter is sort of a cosmic scaffolding, holding galaxies together through sheer abundance, and since it only interacts with matter gravitationally, you cannot see it, and nor can you detect it....yet.
Light can not change direction by passing from one kind of mater to another. In fact, light can only pass through its own type of matter, which is when things like light can go through each other (and only a few types of matter can do that), but even in that case since it can go through, it can't be bent in angle by passing through.
Dark matter is sort of a cosmic scaffolding, holding galaxies together through sheer abundance, and since it only interacts with matter gravitationally, you cannot see it, and nor can you detect it....yet.
Answer 1) A Cosmic Master is an advanced intelligence which has been 'born' through the Logos of a planet. This type of birth is far above the 'normal' terrestrial introduction which most people on Earth have to undergo through successive incarnations.Answer 2) Anything out of Earth, just extraterrestrial matter. (This needs explaining? Are you saying a Master is synonymous with the term matter?)
Transmitted is the passing of light through matter. Without transmission you wouldn't be able to see!!
Light is said to be transmitting when it is passing through any matter i.e. not through a vacuum but through a gas, liquid or solid. Light waves move at their highest speed when passing through a vacuum and slow down when passing through matter due to their interaction with the electrons around atoms, molecules or crystal lattices. Optical fibres made of special types of glass are used to transmit light signals in a similar way to copper wires used to transmit electrical signals.
When light travels through a transparent object, it is transmitted through the material without being absorbed or scattered. The speed of light may change as it passes through the object, causing the light to refract or bend.
The matter through which waves transfer energy is called the medium. Waves can travel through different mediums such as air, water, and solids, and they transfer energy by causing particles in the medium to vibrate.