How do Photochromic lenses work?

  • Thread starter Thread starter Thalita Luna
  • Start date Start date
  • Tags Tags
    Lenses Materials
Click For Summary
Photochromic lenses are designed to remain clear indoors and darken in response to UV light exposure outdoors. This transformation occurs due to photochromic molecules that undergo a chemical change when exposed to sunlight. The lenses provide convenience by adapting to changing light conditions, enhancing visual comfort. Resources like Transitions and Wikipedia offer detailed explanations of the technology and its applications. Understanding the science behind photochromic lenses can help users appreciate their functionality and benefits.
Thalita Luna
Messages
4
Reaction score
1
Photochromic lenses are common in glasses, they stay transparent indoor, but get darken when exposed to sunlight. How does it work ?
 
Engineering news on Phys.org
Somewhat separate from the coffee advice of “buy whole beans, grind fresh at home daily”, I'm looking to understand the factors that contribute to purchased ground coffee losing freshness after opening (oxygen, humidity, temperature, time, other?). I'm assuming oxidation is the main factor, assuming normal room temperature and mid-range humidity. It appears (I'm having trouble finding good info on this) that a high quality modern pre-ground coffee is packaged in a way that maintains...

Similar threads

Replies
6
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 15 ·
Replies
15
Views
8K
Replies
4
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 24 ·
Replies
24
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 7 ·
Replies
7
Views
2K