To watch a droplet hit a surface and detect if there is any air between the drop and surface, the researchers used a technique called total internal reflection microscopy (TIRM).

In a double rainbow, however, a second reflection of light occurs within the water droplet. This additional reflection results in the formation of a secondary, fainter rainbow outside the primary one.

Inside the water droplet, the light is reflected off the inner surface. This internal reflection causes the light to exit the droplet at a different angle, breaking the light into its full ...

The secondary rainbow is caused by a second reflection inside the droplet, and this “re-reflected” light exits the drop at a different angle (50° instead of 42° for the red primary bow).

An illuminated water droplet creates an 'optical atom'. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2023 / 01 / 230131101920.htm ...

Shining light on a water droplet creates effects analogous to what happens in an atom. This can help us understand how atoms work, write researchers from the University of Gothenburg in a new ...

A reflective display based on electro-microfluidic assembly of particles within suppressed water-in-oil droplet array. Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And ...