A t h i n p r i s m P w i t h a n a n g l e 4 ° a n d m a d e o f g l a s s o f i n d e x 1 . 54 i s c o m b i n e d w i t h a n o t h e r p r i s m m a d e o f g l a s s o f i n d e x 1 . 72 t o p r o d u c e d i s p e r s i o n w i t h n o d e v i a t i o n . T h e a n g l e o f p r i s m Q i s ( a ) 5 ° ( b ) 4 ° ( c ) 3 ° ( d ) 2 ° Share with your friends Share 0 Decoder_2 answered this Dear student, For a prism the angle of deviation δ can be written as δ=(μ-1)Awhere μ=refractive index and A= angle of prismnow for no deviation from a composite prism assembly the deviation caused by one shouldbe opposite to the other . So we can write(μ2-1)A2=-(μ1-1)A1A2=(μ1-1)(μ2-1)A1=1.54-11.72-1×4 =3 (ANS) Regards 0 View Full Answer