Periscope is another optical instrument that works on the principle of total ____?
Periscope is another optical instrument that works on the principle of total ____?
پیرسکوپ ایک اور نظری آلہ ہے جو ٹوٹل ____ کے اصول پر کام کرتا ہے؟
Explanation
Periscope uses mirrors or prisms to reflect light at angles.It works on total internal reflection, allowing viewers to see over or around obstacles.