Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I How thick does a material have to be to start to become opaq

  1. Jan 25, 2016 #1
    -que to light?


    Someone said a atom is transparent to light to me.
    but as a material get more thicker, either in single atoms, or a micron, electrons start to absorb light, and there is no more transparency
    How thick does a material have to be before there is no more transparency.
    Like the material acts as a wall to light.
    Now solid state physics can be VERY DIFFERENT than atomic physics.
    When atoms are joined together to form a solid, their behavior can be very different than when they are isolated. There are no more "discrete energy states" at the low-lying range, because these have been replaced by energy BANDS!.
    If I take carbon atoms, and arrange it in one way, I get graphite.
    But I change the arrangement in another way, I get diamond!
    Two completely different types of material, and with different optical properties.
    Yet, each one of them is made of carbon.
    Thank you for your help, anything helps,even a few words.
     
  2. jcsd
  3. Jan 25, 2016 #2

    DaveC426913

    User Avatar
    Gold Member

    Gold need only be a couple of atoms thick to be opaque.
    Water needs to be many tens of metres thick to be opaque.
     
  4. Jan 25, 2016 #3
    Thank you
     
  5. Jan 28, 2016 #4
    Great thank you.
     
  6. Jan 28, 2016 #5

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    Are you aware that you plagiarized one of my posts?

    If you are CITING someone, either use the QUOTE function, or quote what you are copying in " ". Otherwise, this looks as if this was ALL written by you!

    And why are you starting a new thread, rather than asking this as a follow-up to the thread that had this passage that you copied? You have started numerous threads on almost the SAME topic.

    Zz.
     
    Last edited: Jan 28, 2016
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: How thick does a material have to be to start to become opaq
Loading...