█ _ كاتب غير معروف 0 حصريا كتاب ❞ مقدمة بسيطة التحليل الطيفي SPECTROSCOPY ❝ 2025 SPECTROSCOPY: Period (p) – the time required for passage of successive maxima through a fixed point in space Frequency (ν) number of oscillations field that occur per second Equal to 1 p Determined by source and remains invariant regardless media traversed Velocity (v) rate at which wave front moves through medium Dependent on composition medium and frequency مجاناً PDF اونلاين