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Waves — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsWaves2 Marks
Question
Given below are some functions of x and t to represent the displacement of an elastic wave.
$​​​​\text{y}=10\cos[(252-250)\pi\text{t}]\cos[(252+250)\pi\text{t}]$
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Answer

Beats involve $(\text{v}_1+\text{v}_2)$ and $(\text{v}_1-\text{v}_2)$ so beats can be represented by$\text{y}=10\cos[(252-250)\pi\text{t}]$ represents beat so (c) (iii).

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