A-Level Physics OCR A H556

4.4.1: Wave motion

#4.4.1a

progressive waves; longitudinal and transverse waves

#4.4.1b

(i) displacement, amplitude, wavelength, period, phase difference, frequency and speed of a wave

(ii) techniques and procedures used to use an oscilloscope to determine frequency

PAG5

#4.4.1c

the equation $f = \dfrac{1}{T}$

#4.4.1d

the wave equation $v = fλ$

#4.4.1e

graphical representations of transverse and longitudinal waves

#4.4.1f

(i) reflection, refraction, polarisation and diffraction of all waves

Learners will be expected to know that diffraction effects become significant when the wavelength is comparable to the gap width.

(ii) techniques and procedures used to demonstrate wave effects using a ripple tank

(iii) techniques and procedures used to observe polarising effects using microwaves and light

PAG5

#4.4.1g

intensity of a progressive wave; $I = \dfrac{P}{A}$ ; intensity ∝ (amplitude)²

4.3.3

Potential dividers

4.4.2

Electromagnetic waves