sivitdeY this in asl es med Sli rials at procedure 1, Takeast support: INTRODUCTION 2, sete sibance that transfers €ncTEY (OF created when a souree of ener obser" AA wave is a dist ‘Waves ae ere eek Imani from one point © anotisr witost | ae. A bration i repeated a | pees pres inthe medion traveling between he swo | TENT er potion, Thismion tg 4, ldo points. source of the wave. Waves are seen on the pool) other ee ; wvater when a stone is dropped into it The 5, Stretch ‘hrough the medium fom one pointoanotier2s S| cura created by the stone, generates Walt | the SPF medium rss, This movement of eneey allows 1° | aves ina form of ripples (upwards and downs | {as sho waveto work: Imagine tata ducksison De siiee | yement) which move outward until they each held fi ofa lake, The duck moves up and down with the : ch more cused tl an ee wave, which means thatthe wave transfers energy 10 i te peal To ela the dick, The wave moves the water up and down, | circular waves as in Fig, 2: | but the water does not move forward with the wave. | Only energy moves forward. ‘Avwave motion isa succession of pulses propagated | with ime from one region of space to another with energy transmitted in the process. The word is fll of waves; sound waves, Waves on a string, scismic | Fig. 2 waves and electromagnetic waves such as visible | | light, radio waves, TLV signals and X-rays. All of ee ic these waves have their source as vibrating objects | Sate: | end Chapter Obj 8 Stre | m0\ After completing this chaper, you should be abe to dh the following : ee Fig, 23.1; Ripples on a water surface | Da the 1 PenetiepeNS (lion and explain its | The production of wave pulses and waves cin BE | the Pioneer cs demonstrated using a slinky spring or ribber {bite the 5 wei ee One end of the spring is fixed and other end is et Bush ze fee wave equation to solve jerked perpendicularly to the spring or pulled) — 4 Eiputs ie pees ne forward and backwards to its original postion $. Describe the main features and uses of clectromagnetic waves. a mmmme 414 SMM GHANA GOVERNMENT PROPERTY Strictly Not For Salein be ber tubing ad is cite or pulled RTY | Physi Book 2 ne SH opts Demonstrating wave motion by Pena pec rl Bas ou wil exe he peso waves rina slinky spring. eo iat procure 1, Take aslinky spring and fx one end to rigid als: Slinky spring, table, support Jerk the free end sharply up and down and shserve the wave travelling along the sp Place the spring on the table 4 Hold one end and let another student hold the ctherend firmly Sieh the slinky spring slightly and swing the spring sidewa) ‘on the table {as shown in Fig. 23.2) while the other end is horizont eld firmly by the other student and observe the wave generated Fig 232: Wave generared in ved sideways (or up and down) 6, Place the spring again on the table Hold one end an lt anothor student hold the od ily 8. Stich the spring slightly (towards you) and rove your end of the spring forward and Backward (thats, push and pull your end of the string as shown in Fig 233) and observe the wave move towards te Fixed end held by Ou the other student. Fig. 23.4 Wave generared in astrtched slinky spring which is pushed and pulled In this activity, you will explore the iypes of waves eenerated ina ripple tank Matera; Riple tank, wats «mn « sper object (a ball), es Procedure 1. Filth ripple tank (Fig. 23.4) with waterto depth ofabout 10mm. Attach arulerto the vibrator Start the motor and observe the nature ofthe waves generated when the ruler moves up and down, Put somesmall piece of eark on the waterin the ripple tank and observe its movement as ine ruler moves up and down. [in place ofa ripple tank, you may use a bath with waterin {and move a ruler ora wooden bar up and nd ofthe water in the bat). 4. Replace the ruler withthe spherical object. and observe the wave fronts generated inthe ripple tank 5. Vary the volume of the water in the ripple tank and observe the effects of the waves generated in each case ‘tian rite ‘Nave term on viewing ren er we 4 Ripple tank 23.1 and 23.2, a wave can be From. activities deseribed as a disturbance that travels trough & ‘medium from one location to another Toeation: (GHANA GOVERNMENT PROPERTY — Stity Not For Saledoen phase if nit a HOE oe conse Cosine At caFi 24: Phase ofo ra Api he paapi of sate pod ting is son in Fig 212 EA GOVERNMENT PROPERTY‘tanparnt ‘moitam to ansihr of ets du othe aifrece nthe Spee hen ayes | ‘wave tn the two media, The ftequensy 9 Mincnte of ‘eam cn eee 2 eeince af persion of wausmeme 7 mm chen coveraten PROPERTY CONE:‘ANA covesnavent PROPERTY ‘aenial ave ving spose xii gee = Asn =k) ‘The dicenet fe uo dl wave moving inthe ngaiv dstiog of hes boy = Asingwe +t), ‘ty NaF Sale