Atomic clocks and lasers tell about the form of dark matter.

"Researchers used atomic clocks and lasers to detect dark matter’s elusive signals, searching for its wave-like effects. Their approach revealed previously undetectable interactions across space. Credit: SciTechDaily.com" (ScitechDaily, Physicists Are Using Time Itself to Crack the Dark Matter Puzzle)

Time dilation and changes in speed of time can open the mystery of dark matter. Dark matter's gravity effect will change the run of the atomic clock, making dark matter "visible."

Dark matter is like the glue that keeps some galaxies in their form. That means. Most of the galaxies involve dark matter. But dark matter is not in all galaxies. That means dark matter is not homogenously spread in the universe. 

And it might form structures. They are like nebulas. Dark matter also should fall into the black holes and pack around gravity centers. The dark matter causes time dilation. And that is the thing that atomic clocks can measure. So if some kind of dark matter waves travel through the Earth, those atomic clocks can detect it. That thing causes changes in time. 

Another thing that the researchers can use is the laser.  The system calculates the mass of the visible object. Then, it calculates how the gravity lens will change the laser ray's trajectory. After that, it shoots a laser ray past the object. Then, the system sees the real gravity effect. 

Researchers see the dark matter's gravity effect. There are models that dark matter is like a wave. The particle is so small, and its quantum field is so large that it acts like some soap bubble. That makes the material invisible. The elastic field makes reflection impossible or weak. 

The problem with dark matter measurements is that material is only gravitational effect. If dark matter is a very low-mass object, it can cause an effect that only the large size wave of dark matter can affect the Earth's gravity field. The changes in atomic clocks run give researchers information on time and space. Measuring dark matter waves is possible using atomic clocks. 

The atomic clocks are synchronized. And when the dark matter wave travels over them, that changes the oscillation of the atomic clocks atoms. That gives information on the speed of dark matter. 

The system detects that oscillation. The changes between the run of two atomic clocks can measure how thin or large objects the dark matter can form. The system can use atomic clocks as the CCD-cameras that measure the gravitational effects benefiting time dilation. The problem with those measurements is if the dark matter gravitational effect is too large-scale, that effect can be hard to detect.