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কোন একটি সীমাবদ্ধ মাধ্যমে সৃষ্ট স্থির তরঙ্গের কম্পাঙ্ক 500 Hz। তরঙ্গের পর পর দুটি নিঃস্পন্দ দূরত্ব 0.85 m। তরঙ্গের দৈর্ঘ নির্নয় কর-
1.50 m
1.65 m
1.70 m
1.75m
ANSWER : 3
Descrption
<p style="margin-left:0px;">স্থির তরঙ্গের কম্পাঙ্ক,</p><p>f = v/λ </p><p style="margin-left:0px;">যেখানে:</p><ul><li>v হল তরঙ্গের বেগ</li><li>λ হল তরঙ্গদৈর্ঘ</li></ul><p style="margin-left:0px;">এই ক্ষেত্রে,</p><ul><li>f = 500 Hz</li></ul><p>v = fλ </p><p>v = 500 Hz * 0.425 m </p><p>v = 212.5 m/s </p><p style="margin-left:0px;">সুতরাং, তরঙ্গদৈর্ঘ,</p><p>λ = v/f </p><p>λ = 212.5 m/s / 500 Hz </p><p>λ = 0.425 m </p><p style="margin-left:0px;">এবং,</p><p>λ = 0.425 m * 100/85 </p><p>λ = 1.70 m </p><p style="margin-left:0px;">সুতরাং, উত্তর হল <strong>1.70 m</strong>।</p>
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