Read More
Date: 15-2-2020
827
Date: 30-1-2020
972
Date: 2-2-2020
646
|
Pumping is the movement of population from the ground state to a higher excited state. The general rate at which this is done is given by:
Where Ng is the population in the ground level and Wp is the pump rate. Pumping can be done optically, electronically, chemically (see chemical laser), using gases at high flow rates, and nuclear fission.
|
|
علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
|
|
|
|
|
أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
|
|
|
|
|
مكتبة أمّ البنين النسويّة تصدر العدد 212 من مجلّة رياض الزهراء (عليها السلام)
|
|
|