Photochromatic sunglasses in overcast conditions. Photochromatic lenses darken on exposure to ultraviolet (UV) light. The greater the amount of UV light in an environment the darker the lenses become | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 5161 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |