- #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
- 66,802
- 19,441
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
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