pehli bar suicide karne m kitna mja aata hai???? d kitna???
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kitna maja mujhe bhi batao
lol
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The principal axis of a lens is a line passing through the optical centre of the lens and perpendicular to both the faces of the lens.
Step-by-step explanation:
The principal axis of a lens is a line passing through the optical centre of the lens and perpendicular to both the faces of the lens.
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