solid state physics-17| diatomic lattice vibration-02 | optical and acoustical branch | csir net

[@anirbandey6206]

Very very helpful sir

[@gopeshkanha03]

धन्यवाद

[@SS7SKV]

thanku very much sir🙏

[@lisajose9219]

🎉🎉❤🎉🎉

[@anomalous5048]

thank you sir for the lectures.