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  • Answer added in Physics
    8 Do left-hand electromagnetic waves exist in nature? And how can we find it?
    Hello ,Inigo Valan. thanks for you question. Here ,I said” "simultaneously negative values of the dielectric ε and the magnetic μ" means that some... [more]
  • Answer added in Physics
    8 Do left-hand electromagnetic waves exist in nature? And how can we find it?
    hello,Rrandon Johnson. I'm very sorry that I coundn't understand the sentence you explained,could you please explain clearly? 
  • Answer added in Physics
    8 Do left-hand electromagnetic waves exist in nature? And how can we find it?
    in my opinion,all the things both have the positive and the negative charactors,but maybe the god is selfish,he always showed us only one aspect of t... [more]
  • Question asked in Physics
    8 Do left-hand electromagnetic waves exist in nature? And how can we find it?
    It is well known that there are no natural materials having simultaneously negative values of the dielectric ε and the magnetic μ. In general, we ca... [more]
  • Answer added in Methods
    1 what's the buality theory?
    I am sorry,I made a mistake. the followed is right. Aa we know, duality theory is one of the essential charactors of the nature.But I want to know tha... [more]