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CBSE Class 12-science Answered

Foe the same value of the angle of incidence thwe angles of refraction in the media A B C are 15 25 35 degrees respectively. in which medium would it be the velocity of light muinimum ?give reason to ur ans?
Asked by vasturushi | 01 Feb, 2018, 09:52: PM
answered-by-expert Expert Answer
Speed of light in a medium v and refractive index μ of that medium are related as follows
begin mathsize 12px style mu space equals space c over v comma space w h e r e space c space i s space s p e e d space o f space l i g h t space i n space a i r end style
refractive index is given by begin mathsize 12px style mu space equals space fraction numerator sin space i over denominator sin space r end fraction comma space i space a n d space r space a r e space a n g l e space o f space i n c i d e n c e space a n d space r e f r a c t i o n space r e s p e c t i v e l y end style
for a given angle of incidence, angle of refraction is less in a medium compare to other medium means refractive indexof that medium is more.
 
hence in the given problem medium A is giving minum angle of refraction 15°. Hence refractive index of medium A is highest.
 
if refractive index is maximum in medium A means, speed of light is minimum in medium A
Answered by Thiyagarajan K | 01 Feb, 2018, 10:40: PM

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