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7.2. Transverse and longitudinal waves
A subsection of Physics, 9702, through 7. Waves
Listing 10 of 27 questions
By reference to vibrations of the points on a wave and to its direction of energy transfer, distinguish between transverse waves and longitudinal waves. Describe what is meant by a polarised wave. The variation with distance x of the displacement y of a transverse wave is shown in . 1.0 –1.0 –2.0 –3.0 2.0 y / cm 3.0 A B A B 0.2 0.6 1.0 1.2 x / m 0.4 0.8 Use to determine 1. the amplitude of the wave, amplitude = cm 2. the phase difference between the points labelled A and B. phase difference = Determine the amplitude of a wave with twice the intensity of that shown in . amplitude = cm
9702_w11_qp_23
THEORY
2011
Paper 2, Variant 3
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State one difference and one similarity between longitudinal and transverse waves. difference: similarity: A laser is placed in front of two slits as shown in . 2.5 m slits 0.35 mm screen laser (not to scale) The laser emits light of wavelength 6.3 × 10–7 m. The distance from the slits to the screen is 2.5 m. The separation of the slits is 0.35 mm. An interference pattern of maxima and minima is observed on the screen. Explain why an interference pattern is observed on the screen. Calculate the distance between adjacent maxima. distance = m State and explain the effect, if any, on the distance between adjacent maxima when the laser is replaced by another laser emitting ultra-violet radiation.
9702_w14_qp_22
THEORY
2014
Paper 2, Variant 2
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Questions Discovered
27