Two strings under the same tension are joined

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Two strings under the same tension are joined. String A has a linear mass density of 0.010 kg/m0.010\,\text{kg/m}; String B has 0.040 kg/m0.040\,\text{kg/m}. A pulse of wavelength 1.20 m1.20\,\text{m} travels along String A toward the junction. Which of the following correctly states whether the reflected pulse on String A is inverted and gives the wavelength of the transmitted pulse on String B? (a) Reflected pulse is not inverted; transmitted wavelength is 0.60 m0.60\,\text{m} (b) Reflected pulse is inverted; transmitted wavelength is 0.60 m0.60\,\text{m} (c) Reflected pulse is inverted; transmitted wavelength is 2.40 m2.40\,\text{m} (d) Reflected pulse is inverted; transmitted wavelength is 0.30 m0.30\,\text{m}

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