Acoustic waves path?

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Can anyone identify this Platypria species (Chrysomelidae) from Sulawesi?

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Are the following references of interest for your project?

Martins, D. J. & S. D. Johnson. 2007. Hawkmoth pollination of aerangoid orchids in Kenya, with special reference to nectar sugar concentration gradients in the floral spurs. American Journal...

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How to prepare DNS curve when determining enzyme activity (IU)?

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Can a paper that is posted as a preprint in a database with DOI, can be reviewed in another journal and accepted for publication??

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Gamliel Roos

Thanks for your answer, is there a mathematics expression of this phenomena or a definition more precise of when its works and what are the condition?

thanks very much

Galyna Ivanovna Sokol

Yes, it is. And acoustic filds.

I don't understand your answers very well.

Thanks

thanks very much!!

Dear Gamlie Roos, the Fermat's principle in electromagnetic wave is good for electromagnetic wave.