Solution:
Snell’s laws of light refraction are a set of rules that govern how light bends.
(i) At the point of incidence, the incident ray, the refracted ray, and the normal are all in the same plane.
(ii) For a given pair of media, the ratio of the sine of the angle of incidence (i) to the sine of the angle of refraction (r) is constant.
1μ2 = constant sin I / sin r
where the refractive index of the second medium with relation to the first medium is constant 1μ2.
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 