Page 54 - كتاب تاسع فيزياء الفصل 2 تفاعلي. هويدا محمود

ZyY1a -† &fa 5-Na £ 1:M N 1a -%ra

o<z¬ œdTÐ oGz^TÐ ì{v pdd« Éô ¾-¼¿ ÒڍZTÐ Z ±b9 ^ C: ½C=7 C ¯ –E4K ‡ C7Õ = ¹ C2Õ 2K _
»±
r™e= fQ ÒÊÐ|aTÐ ŽcK ÜmeTÐ ÒzKm–dT ocw\TÐ :d Š± b ; ± c9 –_
R9 ½C=7: Ò­
|ö d™–w oIm–—<í oKm—\TÐ ‚ö T Ò|—¬ bX ÒڍÉ
d Ø C c9 F S R C C<=Ø »@ ¹Pú Ò E
P4 ± _
»± Q
oœ`ZTÐ ‰`GÌ œh mf—œG Q ÊîÚmaTÐ .E
P4 ±

³R ú 8: ± E
P4 ± E2
±b a= ¯ R3;Ù ÔQ ± _ ± Ðb8 E C : ± c9 (·C 0: ±’ _ ± ^= : C:Õ <
_
»± Q
X2K _
R ] º C; N: Ò .³»@ ± ` E
P4 ± c ¯ ²R ­ .E
P4 ± ` E = 0 ±
C< 6 E7 R2 C Ò .ž-›ž ^8/ ± d NhÛ b b C: –E4Û ­
` ±«Õ P 2 Ò 1 `= Ø C4 _
R –œ-›ž ^8/ ± d E4 K : ± :(_< ± ½­»’ _ ± c9 ­ ` ±«Õ P `= Ø C4 _
»± Q
–E
P4 ± Ñ»b P4 ËR ; Ò »b :9 ¼× ±b C: P ­
:(O) _ ± ^ ú : ÔQ ± _< ± ½­» S R: RÛ : _=7 XÛ R Š±Ò ¥F ³»@ ± R RÛ : Ò

.ËR ; Э ÐÒ¹ E
P4 ± S R R 4 –1 ÃC4/ ± ¦ .E
P4 ±
CÊ<= ZÊ CÊ7 dÊ ± EÊ27; ± PÊ; ³»bÊ0 ± _Ê
»± Q
E
P49 Ñ»b P; ËR ; Ò –»b :9 ¼× ±b –2 ÃC4/ ± ¦
.³»@ C ±»ÕÛ C .ÐC C4/ ±

C: »b P4 бP C ^ –2 Ò 1 ÐC C4/ ± Z C7 „ X2K d ³»b0 ±Ò E
P4 ± S R `= E C : ± T Ú ¡
c ¯ `= Ø C4/ ± PÛ Î ` Z=2 –] Q Ò .E
P4 ± E R ± d C< P Ò d ± E C ˆ± ^ .] ¿Û C ± E4Û M±
Э Í»P Э –E42ú 7 : ± Áb2 ± a;=Û C: –û9 ±
._ ± û9 E27 ` ÐC ¹C C:< Û ? бÒP `= Ø C4/ ± ©C< 6 d

.(I) ³»b0 ± ½­» Z b b ±Q Ò ³»b0 ± ^ .a »bj ¹C4 ­Ò ·C 0: ± ^= ¹C4 ­ T Ú ¢
E4Û M± X2K Z ] º лC ©³R5Û 0 Ï­ ³R Û 8

.] ¿Û C ±

R ­ ·C 0: ± ` E C c9 Ðb8 G= E
P4 ± Zh £
Ô»@ ± P4Ù ± ÐC ±ºA .(2f) Ô»@ ± P4Ù ± û4h `
·C 0: ± ` 40 cm P4Ù c9 E
P4 ± ZhØ – Õ 15 cm

.(¢ c ¯ ž ` ´±b2 ± »Rú ’

E9
­

E PK : ± E
P4 ± S Û R û= `=Û Ù E4Û ­ X2K _
»± ›-›ž
.E ¼±b : ± «b1 ± E4Û ­

©E PK : ± E
P49 ³»@ C ¹b07: ± C œ-›ž

³R ú 8: ± ´C
P4 ±

±º¯ –E PK E
P d (Magnifying glass) ³R ú 8: ± E
P4 ±
a »bj ÓR –C< ` ´R3 Ò R=5j _ ` C< RK
d ³R ú 8: ± E
P4 ± _<Ú Ù û= -›ž ³»b0 ± `=ú Ù .³R K 8
.R0 ± d û4h ` d C4 V / Ãb 2: ± XÛ ± R= 8

Ÿ Ÿ