(a) Write down a similar expression for aμg in terms of angle i and r.
(b) If angle r = 900, what is the corresponding angle i called?
(c) What is the physical significance of the angle i and part (b)?
Solution:
(a) aμg = sin r / sin i
(b) If the refractive angle r = 90 degrees, the corresponding angle of incidence I will be equal to the critical angle.
(c) If the angle of incidence is greater than the value of I determined in part, total internal reflection occurs (b)
and 
, internal resistance 
and 
, connected in parallel. The equivalent emf of the combination is- (A) 
(B) 
(C) 
(D) 
and 
are collinear, prove that 
and 
be three points such that area of a 
is 4 sq units, find the value of 
.
and 
is 35 sq units.
and 
are collinear.
and 
are collinear.
and 
are collinear.
and 