an object placed 20cm from a converging lens forms a magnified clear image on a screen. when the lens is moved 20cm towards the screen. a smaller clear image is formed on the screen. calculate the forcal length of the lens. (a) 1.33 (b)0.133 (c)2.33 (d)3.33 (e)13.3


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Question Number 133860 by aurpeyz last updated on 24/Feb/21

$a n o b j e c t p l a c e d 20 c m f r o m a c o n v e r g i n g$ $l e n s f o r m s a m a g n i f i e d c l e a r i m a g e$ $o n a s c r e e n . w h e n t h e l e n s i s m o v e d$ $20 c m t o w a r d s t h e s c r e e n . a s m a l l e r$ $c l e a r i m a g e i s f o r m e d o n t h e s c r e e n .$ $c a l c u l a t e t h e f o r c a l l e n g t h o f t h e$ $l e n s .$ $(a) 1.33$ $(b) 0.133$ $(c) 2.33$ $(d) 3.33$ $(e) 13.3$
Commented by aurpeyz last updated on 25/Feb/21

$p l s h e l p$
Commented by aurpeyz last updated on 25/Feb/21

$s o m e b o d y h e l p m e$
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