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The graphical representation of two waves of the same amplitude, generated at specific intervals of time, is given below.(i) What is the wavelength of the first wave? What about the second one?(ii) Which wave has a higher wavelength?(iii) Calculate the frequency of each wave if they have traveled this distance (12 m) in 0.25s.(iv) What change takes place in the wavelength |
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Answer» (i)
(ii) First wave has a higher wavelength. (iii) Frequency of the first wave f = n/t = \(\frac{3}{0.25}=\frac{300}{25}=12\) Hz frequency of the second wave f = \(\frac{6}{0.25}=\frac{600}{25}=24\) Hz (iv) As frequency increases, wavelength decreases. Wavelength of a wave with a constant speed decreases with increase in frequency, ie. frequency is inversely proportional to the wave length. f ∝ 1/λ |
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