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## Chapter Topics:

Progressive waves
Transverse and longitudinal waves
Polarization
Determination of frequency and wavelength of sound waves

## Learning Objectives:

(a) Show an understanding of and use the terms displacement, amplitude, period, frequency, phase difference, wavelength and speed.

(b) Deduce, from the definitions of speed, frequency and wavelength, the equation v = fλ.

(c) Recall and use the equation v = fλ.

(d) Show an understanding that energy is transferred due to a progressive wave.

(e) Recall and use the relationship, intensity ∝ (amplitude)²

(f) Show an understanding of and apply the concept that a wave from a point source and travelling without loss of energy obeys an inverse square law to solve problems.

(g) Analyze and interpret graphical representations of transverse and longitudinal waves.

(h) Show an understanding that polarization is a phenomenon associated with transverse waves.

(i) Recall and use Malus’ law (intensity ∝ cos²θ) to calculate the amplitude and intensity of a plane polarized electromagnetic wave after transmission through a polarizing filter.

(j) Determine the frequency of sound using a calibrated oscilloscope.

(k) Determine the wavelength of sound using stationary waves.

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