It's something to do with the refraction of the light.
Light- refraction for near-invisibility and sensors for constant medical feedback.
Some of the most common vision tests include visual acuity tests, refraction, visual field tests and color vision tests.
Without butterfly around the refraction will be not happen.
The luster of the real pearl is unique and depended on the reflection, refraction and diffraction of light on the translucent layers of the pearl.
This gives each diamond an ideal set of proportions for optimal reflection and refraction of light.
Sound effects such as absorption, reflection, refraction or interference are also studied by acoustics.