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[@zahhak_chou]

thank u sooo much im from algeria and i really appraciate ur work 💞✨

[@Marcosss-7-years-ago]

5:00 do you mean radio waves instead of sound waves? Because not all sound waves have the same wavelength, and sound isnt electromagnetic radiation

[@resvolver]

For the last problem, I think you did it wrong> You didn't convert the nm to m first.