PROPERTIES+OF+WAVES

IGCSE PHYSICS > WAVES =b PROPERTIES OF WAVES= c THE ELECTROMAGNETIC SPECTRUM d LIGHT AND SOUND media type="custom" key="27193770" INTRODUCTION TO IGCSE WAVES ACTIVITY 3.2 describe longitudinal and transverse waves in ropes, springs and water where appropriate

LONGITUDINAL WAVE: Wave where the oscillation is parallel to the direction in which the energy travels. TRANSVERSE WAVES: Wave where the oscillation is perpendicular to the direction in which the energy travels

LINK TO JAVA ILLUSTRATIONS OF LONGITUDINAL AND TRANSVERSE WAVES

3.3 state the meaning of amplitude, frequency, wavelength and period of a wave DISPLACEMENT: The distance of a particle in the wave from the rest position. AMPLITUDE: The maximum displacement of a particle. FREQUENCY (f): The number of oscillations in one second. TIME PERIOD (T): The time taken for one oscillation. WAVELENGTH (λ): The distance along the wave from one particle to the next particle making an identical oscillation. WAVESPEED: The speed with which the energy of the wave travels. CREATING WAVE DIAGRAMS ACTIVITY

3.4 recall that waves transfer energy and information without transferring matter





3.5 recall and use the relationship between the speed, frequency and wavelength of a wave: wave speed = frequency × wavelength v = f × λ 3.6 use the relationship between frequency and time period:

3.7 use the above relationships in different contexts including sound waves and electromagnetic waves

**EXAMPLES (Remember FRISCAU and significant figures)** 1 What is the wavelength of a sound wave with speed 330 m/s and frequency 5.5 kHz? [6.0 cm] 2 Radio-waves of wavelength 1500 m travel at 300 000 km/s. What is their frequency? [200 kHz] 3 The largest measured sea wave had a period of 14.2 s and wavelength of 342 m. What was its speed? [23.1 m/s]




 * 3.8 understand that waves can be diffracted when they pass an edge **
 * 3.9 understand that waves can be diffracted through gaps and that the extent of diffraction depends on the wavelength and the physical dimension of the gap. **

DIFFRACTION APPLET

DIFFRACTION: The way waves can spread out after passing an object or opening with a size similar to the wavelength of the wave.


 * ACTIVITY: IN THE SITUATIONS BELOW, COMMENT ON THE TYPE OF WAVES, THE WAVELENGTH AND THE DIMENSIONS OF THE GAP **

RIPPLE TANK SIMULATION WITH MANY OPTIONS