समतुल्य लेंस या समतुल्य फोकस दूरी तथा जब दो लेंस सम्पर्क में हो तो समतुल्य फोकस दूरी का व्यंजक

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Bahut mast samjhaye sir maja aa gaya ek dam

[@DipuTech74]

Nice video

[@mr_sami_01]

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God

[@saurabhsrivastava7648]

Good morning sir

[@DipuTech74]

Video par thumbnail lagaye

[@Upendrakumar-pf2gv]

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Thanks

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[@shortconceptbygagansir6746]

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[@adityaphysicsclassesbasant5098]

Thanks

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