The amount of waves passing via a specified place during the interval of one 2nd. The upper the frequency, the shorter the wavelength.???? ? ???? ?????? ??????? ?? ???? ???? ? ?? ???????? ?????? ??????? ?? ??? ? ?? ?????? ??? ????? ??? ???????? ?? ??????? ????? ??? ? ????? ??? ??? . ??????? ) ?????? ???? ? ?????? ????? ?????? ?? ?????? ( ?????? He … Read More