Lect27 - Reflection i r ! " # $% & '' ( ()...

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Unformatted text preview: Reflection i r ! " # $% & '' ( () Flat Mirror r i Object All rays originating from peak will appear to come from same point behind mirror! Image 12 + ,1 + ,1 + , 34 +*, '' ( ' ' ) $ ) ( 2 ( $ ( ) . 0 r i /( d d * 9( / ' # $ ( ( ) $ 6 7) 8 # 9) 7 # # ) $ 6 # ) ' ( ) 5 9( ' ( ( ) $ 6 7) 8 # 9) 7 # # ) # $ $ # ' 6 )/ ( )- / & & : " ( ( 6 ( 9 6 9 ' ' 4 ' ( ( ( < = (( Note: analogous to "converging lens" Real object can produce real image + ( ' ( ,) < ' ( ( ( # ( = 6 ( $ > f ; ' ( ,@ @ ( ( ' $ < 9= ? @ ,1 ,1 ' 4 ' ' ( 4 al norm $% ( normal " # ' ( ' ( Note: any other ray from tip of arrow will be reflected according to i = r and will intersect the two rays shown at the image point. 2 ( A 6 ( f>0 s>0 s' > 0 1 S M 1 S S S 1 f $% 2f ( f & 9 #' The diagram above shows three light rays reflected off a concave mirror. Which ray is NOT correct? A B C 9 ' ) ( 6 ( B 1 S M 1 S S S 1 f $% ( & ( 1 S 6 $ 1 S S S 1 f A A M $% ( & * A A2 ( ( $ $ ( ( $% ( +6 , 5 A A2 ( 6 ' $ f>0 s>0 s' < 0 1 S M 1 S S S 1 f $% ( +6 , &C2 : 9 #' $ The diagram above shows three light rays reflected off a concave mirror. The image is A. Upright and reduced B. Upright and enlarged C. Inverted and reduced D. Inverted and enlarged 9 6 4 9 (( ' ' $ 4 ' ( ( ( : < = Note: analogous to "diverging lens" Real object will produce virtual image ; A2 ( 6 ' ( f<0 s>0 s' < 0 1 S M 1 S S S 1 f $% ( +6 , C2 A2 &C2 ? 34 A A 6 6 ( (( ! D A2 + 6 6 , A 6 $ 6 ' $ 6 A A2 1 S 1 S 1 f C2 M S S A2 6 ' ( 6 4 + 6 , 6 2 / & 1 S 1 S 1 f ( " ' M S S % & 6 ' 6 6 # ' ( ' ( 6 ' & ' ' 6 6 6 $% ( 6 6 ' & ' ' 6 6 6 $% ( 6 < ' < ' ( (= (= + ( ( 6 , < ' < (= (= 9 #' The image produced by a concave mirror of a real object is A. Always upright B. Always inverted C. Sometimes upright and sometimes inverted ( 1 S 6 $ 1 S S S 1 f A A2 A A M ( ( $ $ ( ( $% $% $% ( +6 , ( & / 6 $% ( $ ) / 6 $% ' ' ( ) 9 #' $ The image produced by a convex mirror of a real object is A. Always upright B. Always inverted C. Sometimes upright and sometimes inverted A2 ( 6 ' ( $% ( +6 , C2 A2 &C2 / E ( # $ # ' 6 ) 9 ' ( ' +F 2 ( F 5 ( ,) (-20,-15) 20,- @ 6 4 52 ( ) y @ 5 2 x G ' & ( H 3I J K J & F &J J L L ( ( ' I I ( 4 ( * 9 ' ( ' +F 2 ( F 5 ( ,) ( 7,f = 5 ( ( 6 y @ 6 4 52 ( ) (-20,-15) 20,- y R=5 0 x G , f 52 ( ' @ H 1 ,f = F 5 ( 9, f = F52 ( 5 () M M @J ( ( R f <0 f = - 25 cm 5 9 ' ( ' +F 2 ( F 5 ( ,) 4 ) ( 7, ) ( 5 ( 9, F ) H ( 1 ,F @ 6 4 52 ( ) (-20,-15) 20,- y R=5 0 f = -25 cm x G , ) ( 5 I 1 s 1 f 1 s s fs s f ( 25)(20) 20 25 ( 2 ( F 5 ( F ) ( 6 + < = ( , : s & C2 9 ' ( ' +F 2 ( F 5 ( ,) ' ( 7 , F 2) M y @ 6 4 52 ( ) (-20,-15) 20,- R=5 0 x = 11.1 cm f = -25 cm x G ,F ) ( S S ( ( H 1 , F;) ( 9, F?) I & ( 2 ( F ) ( $% 2) 55: 2) 55: 2) 55:N+F 5 ( , F;) * ( ...
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