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একটি চলমান তরঙ্গ (traveling wave) -এর সমীকরণ y=0.2 sin 4  (240t -x) হলে, এর তরঙ্গদৈর্ঘ্য (wavelength) কত হবে?

Created: 3 years ago | Updated: 4 days ago
Updated: 4 days ago
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