দোলনকাল T = 2π√(l/g) = 2π√(1m /9.8 m/s2)=2.0 s/ 9.8\,\text{m/s}^{2}) = 2.0\,\text{s}/9.8m/s2)=2.0s।
SSC (Class 9-10) › Physics › Chapter 7: তরঙ্গ ও শব্দ (Waves and Sound)
Aligned to the NCTB national curriculum.