please help why is it not advisable to use a small angle of incidence when performing experiment on refraction in a rectangular prism????


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Question Number 35876 by NECx last updated on 25/May/18
$please help why is it not advisable to use a small angle of incidence when performing experiment on refraction in a rectangular prism????$
$p l e a s e h e l p$ $w h y i s i t n o t a d v i s a b l e t o u s e a$ $s m a l l a n g l e o f i n c i d e n c e w h e n$ $p e r f o r m i n g e x p e r i m e n t o n r e f r a c t i o n$ $i n a r e c t a n g u l a r p r i s m ? ? ? ?$
Commented by tanmay.chaudhury50@gmail.com last updated on 26/May/18

$i n s e a r c h o f t r u e a n s w e r$
Commented by ajfour last updated on 26/May/18

$l e s t i t d o e s n o t u n d e r g o t o t a l$ $i n t e r n a l r e f l e c t i o n . .$
Commented by tanmay.chaudhury50@gmail.com last updated on 27/May/18
$yes you are right... let say mathematically ((lim)/(i→(i_θ )_c )) then refraction→Total internal reflection (i_θ )_c =critical angle when i→(i_θ )_c then refraction→Total internal reflection the very pupose to check the refraction property of light can not be experimented as most of light energy gets reflected in second medium minimum energy perform refraction.$
$y e s y o u a r e r i g h t . . .$ $l e t s a y m a t h e m a t i c a l l y$ $\frac{l i m}{i \to {(i_{θ})}_{c}} t h e n r e f r a c t i o n \to T o t a l i n t e r n a l$ $r e f l e c t i o n {(i_{θ})}_{c} = c r i t i c a l a n g l e$ $w h e n$ $i \to {(i_{θ})}_{c} t h e n r e f r a c t i o n \to T o t a l i n t e r n a l$ $r e f l e c t i o n$ $t h e v e r y p u p o s e t o c h e c k t h e r e f r a c t i o n$ $p r o p e r t y o f l i g h t c a n n o t b e e x p e r i m e n t e d$ $a s m o s t o f l i g h t e n e r g y g e t s r e f l e c t e d i n$ $s e c o n d m e d i u m m i n i m u m e n e r g y p e r f o r m$ $r e f r a c t i o n .$
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