Dark matter, time, and quantum waves are distinct concepts with different properties. Let's discuss each of them individually:
Dark Matter: Dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation, making it invisible or "dark" to our current methods of detection. It is believed to make up a significant portion of the total mass in the universe, based on observations of its gravitational effects on visible matter and the structure of galaxies. Dark matter is not considered virtual; it is postulated to be a real and physical component of the universe.
Time: Time is a fundamental aspect of our perception and the measurement of events and processes. It is not typically considered virtual, but rather a fundamental dimension through which events unfold. Time is often thought of as a continuous and linear progression, though some theories in physics propose alternative conceptions of time, such as spacetime curvature or the idea of "block time," where past, present, and future coexist.
Quantum Waves: Quantum waves, also known as wave functions, are mathematical representations used in quantum mechanics to describe the behavior and properties of quantum particles. These waves exhibit both particle-like and wave-like characteristics, and they are used to calculate probabilities of different outcomes in quantum interactions. Quantum waves are not considered virtual in the sense of being illusory or unreal; they are fundamental mathematical constructs that describe the behavior of quantum systems.
In summary, dark matter is a hypothetical form of matter, time is a fundamental aspect of our reality, and quantum waves are mathematical descriptions used in quantum mechanics. While the concept of virtuality can arise in certain contexts in physics, such as virtual particles, it does not directly apply to dark matter, time, or quantum waves as commonly understood.