Kiera+T

Kiera Tai 2011-2012
 * THE STUDY OF WHICH SHADE OF SUNGLASSES BLOCK THE MOST LIGHT **

The purpose of this experiment was to determine which color tint of sunglasses would block the most light. Sunglasses have seven layers. From the layer closest to the eye it is the antireflective back, the tinting layer, the lens, the polarization layer, the antireflective coating, the UV coating, and the scratch resistant coating. A flashlight was placed a fixed distance in front of a lens of sunglasses and a light probe was placed a fixed distance behind the lens. The flashlight was turned on and the amount of light that passed through the lens was measured with the light probe. The black tinted sunglasses were found to block the most light. This is probably because it is the darkest color.
 * ABSTRACT **

Black tinted sunglasses were found to block the most light. It was expected that the black tinted sunglasses would block the most light, but it was not expected that the orange sunglasses would block more light than the grey sunglasses. The greater the sunglasses are from the light source the less light there is. This was expected. Salt water on the lens will block more light than regular water and if there was nothing on the lens. This was also expected. These results are important to others because when buying sunglasses, one might have to consider what color tint to buy. And interesting experiment to do in the future would be to test which brand or tint of sunglasses will block the most UV light compared to regular light.
 * CONCLUSION **