شرح ساينس الصف الثاني الاعدادي لغات
شرح ساينس تانية اعدادي

لينك تحميل الملزمة
https://drive.google.com/file/d/1guFZFe2N5QKd3M1dHBqR0ZCqUBgkI9k3/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Video :
Wave motion:
It is periodic motion produced as a result of the vibration of medium particles at a certain moment and in a definite direction.
The line of wave propagation:
It is the direction through which the wave propagates.
 Types of waves:
Transverse and Longitudinal waves:

بالتوفيق
مستر احمد الباشا