How will you differentiate between the convex lens and concave lens i) A distant object ?

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Solution

$D e a r s t u d e n t, A c o n v e x l e n s b r i n g s t o g e t h e r t h e p a r a l l e l b e a m o f l i g h t c o m i n g f r o m a d i s \tan t o b j e c t, w h i l e t h e c o n c a v e l e n s d i s p e r s e s t h e p a r a l l e l b e a m o f l i g h t c o m i n g f r o m d i s \tan t o b j e c t . S o a l l t h e l i g h t r a y s m e e t, i . e . p o i n t o f c o n v e r g e n c e a t f o c u s f o r t h e c o n v e x l e n s, b u t f o r t h e c o n c a v e l e n s, t h e f o c a l p o i n t i s t h e p o i n t f r o m w h e r e t h e l i g h t r a y s s e e m t o d i v e r g e, i . e . p o i n t o f d i v e r g e n c e . R e g a r d s$

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