A periscope is an optical instrument that uses mirrors to reflect images through a tube. The mirrors are placed at an angle of _____?
ایک پیرسکوپ ایک آپٹیکل آلہ ہے جو ٹیوب کے ذریعے تصاویر کی عکاسی کرنے کے لئے آئینے کا استعمال کرتا ہے۔ آئینے _____ کے زاویہ پر رکھے جاتے ہیں؟
Answer: 45 degree
Explanation
In a periscope, mirrors are placed at 45° angles to reflect light down the tube.
This allows the viewer to see over or around obstacles.
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