the refractive index of medium one w.r.t. medium 2 is 1.5 :
1) a ray of light on passing from medium 1 to medium 2 ,will it bend away or towards normal?
2)a ray of light passing from medium 2 to medium 1will bend away or towards normal?

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Solution

$A s w e k n o w w h e n r a y o f l i g h t t r a v e l s f r o m r a r e r t o d e n s e r m e d i u m t h e n i t b e n d s t o w a r d s t h e n o r m a l a n d w h e n r a y t r a v e l s f r o m d e n s e r t o r a r e r m e d i u m t h e n i t w i l l b e n d s a w a y f r o m t h e n o r m a l . 1) a r a y o f l i g h t o n p a s \sin g f r o m m e d i u m 1 t o m e d i u m 2, w i l l i t b e n d a w a y f r o m t h e n o r m a l . 2) a r a y o f l i g h t p a s \sin g f r o m m e d i u m 2 t o m e d i u m 1 w i l l b e n d t o w a r d s n o r m a l .$

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