Looking for a material that will change colors

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The discussion focuses on finding a material that changes color based on sunlight exposure, similar to a mood ring but with distinct colors and rapid changes. Participants suggest exploring photochromic materials like Silver Chloride, which darkens under UV light. However, mood rings are deemed unsuitable as they react to temperature rather than sunlight. There is a request for more details about the intended experiment to better assist in finding a solution. A suggestion is made to consider living leaves, which change color over time based on light exposure.
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I am looking for a material that will change colors depending on how long it is in the sunlight. Any thoughts?
 
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Most everything does.

You may need to be a little more specific.
 
Basically like a mood ring. Something that will change as quick at hourly. But the colors need to be distinct. Thoughts? Or maybe some kind of chemical?
 
You are looking for photochromic materials. Silver Chloride comes to mind. It gets darker as it is exposed to UV.
 
dshallum said:
Basically like a mood ring. Something that will change as quick at hourly. But the colors need to be distinct. Thoughts? Or maybe some kind of chemical?

Why not just track down a mood ring?
 
dshallum said:
I am looking for a material that will change colors depending on how long it is in the sunlight. Any thoughts?

Since you want the color change to be caused by sunlight, then a mood ring would NOT be a solution. It changes color according to temperature.

Will you please describe in more detail exactly what your proposed experiment would be? What's your objective? What do you plan to demonstrate or measure? Members here can contribute, but are not mind readers. Thank you.
 
How about a (living) leaf? Over a relatively long period of time, its colour will depend upon illumination.
 

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