- #1
Thalita Luna
- 4
- 1
Photochromic lenses are common in glasses, they stay transparent indoor, but get darken when exposed to sunlight. How does it work ?
In summary, the conversation involves a person asking for help with summarizing content and being told that they do not respond to questions, but only provide summaries. The person is then given the task of summarizing the conversation itself.
- #2
berkeman
Mentor
- 67,059
- 19,877
Welcome to PF. 
Google is your friend; following links are from searches on photochromic lens and photochromic molecule:
https://www.transitions.com/en-us/why-transitions/the-technology/photochromic-tech/
https://en.wikipedia.org/wiki/Photochromism
Google is your friend; following links are from searches on photochromic lens and photochromic molecule:
https://www.transitions.com/en-us/why-transitions/the-technology/photochromic-tech/
https://en.wikipedia.org/wiki/Photochromism
Last edited:
1. How do photochromic lenses work?
Photochromic lenses contain molecules that are sensitive to ultraviolet (UV) light. When exposed to UV light, these molecules undergo a chemical reaction that causes them to darken. This darkening blocks out harmful UV rays and reduces glare.
2. Are photochromic lenses the same as transition lenses?
Yes, photochromic lenses and transition lenses are the same. They both refer to lenses that darken when exposed to UV light and lighten when removed from UV light.
3. Do photochromic lenses work in all lighting conditions?
Photochromic lenses are designed to work in a wide range of lighting conditions, from bright sunlight to indoor lighting. However, they may not darken as much in very hot or cold temperatures.
4. How long do photochromic lenses take to change color?
The time it takes for photochromic lenses to change color depends on the amount of UV light present. In bright sunlight, the lenses can darken in as little as 30 seconds, while in low light conditions, it may take a few minutes.
5. Can photochromic lenses be used as sunglasses?
Yes, photochromic lenses can be used as sunglasses as they provide UV protection and reduce glare. However, they may not darken as much as traditional sunglasses, so they may not be suitable for very bright conditions.
Similar threads
-
Materials and Chemical Engineering
-
Classical Physics
-
Chemistry
-
Electromagnetism
-
Introductory Physics Homework Help
-
Other Physics Topics
-
Chemistry
-
Advanced Physics Homework Help
-
Materials and Chemical Engineering