A QUANTITATIVE STUDY ON CHROMOTHERAPY by Samina Tazayyen Yousef Azeemi, Physics Department, University of Balochistan, Quetta, Pakistan
This study explores what happens when water is exposed to different colors of visible light (like red, green, or purple).
Here’s the main idea:
Water Absorbs Light Energy:
When light shines on water, the water molecules soak up specific colors (wavelengths) of light. Each color has its own energy, and water molecules “tune in” to these energies, a process called chromotization.
This absorption makes the water molecules vibrate at the same frequency as the light, putting them in a special “resonance state.”
Water Molecules Form Shapes:
The vibrating water molecules group together to form tiny structures called hydration spheres. These are like organized clusters of water molecules shaped like pentagons, hexagons, or other polygons (see Fig. A in the original text).
These shapes form because the light’s energy creates a kind of “charge organization” in the water, a concept called charge quantization. This means the energy is distributed in specific amounts, like packets, affecting how water molecules bond.
How Light Energy is Absorbed:
Water doesn’t absorb all the light’s energy at once—it takes it in gradually over time. For example, after 6 hours of exposure to colored light, water forms these hydration spheres. After 12 or 18 hours, the effect doesn’t change much, meaning the water reaches a “saturation point” where it can’t absorb more energy.
This was seen in experiments with colors like green, orange, purple, and yellow (in ultraviolet and visible light). Graphs showed similar patterns after 12 and 18 hours compared to 6 hours.
What Happens Inside the Molecules:
When water absorbs light, the energy excites the electrons (tiny charged particles) in the water molecules. This makes the electrons “wobble” or vibrate, increasing their energy.
The extra energy stretches the bonds between hydrogen and oxygen in water (H₂O), making them longer. It’s like the molecules are energized and stretched out.
This process is similar to the Compton Effect (where light scatters off particles), but here, the electrons are still bound to the molecule and only absorb part of the light’s energy.
Key Measurements:
The study calculated things like the propagation vector (how the light’s energy moves through water) and the quantum mechanical dipole moment (how charges shift in the molecule). These help explain how the energy organizes the water into shapes.
They also measured the length of covalent bonds (how far apart hydrogen and oxygen atoms are) and relaxation time (how long it takes for the molecule to settle after absorbing energy).
Big Picture:
When water is exposed to colored light, it doesn’t just sit there—it changes! The light’s energy makes water molecules vibrate, form geometric clusters, and stretch their bonds. This shows water can “respond” to light in a structured way, which could be important for understanding how light affects liquids or even biological systems.