INTRODUCTION

  Welcome to "Light and Sound Country".
  On this site you can learn about light and sound from
   basic to applied.
  Also, you can check many things with your own eyes
   through experiments.
  It may be connected to the future by deepening and
   understanding knowledge in the presence of various
   phenomena.
  Let's understand from the basic. Here we go!




Quote:https://pixabay.com/ja/( Outside)


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