At a point the angle of elevation ofvthe pole is such that it's tangent is5/2.On moving 240m towords the pole, the tangent to the angle of elevation becomes 3/4. Find the height of the pole.
Soni Kumari answered this
for the same angle of incidence of 45 degree, the refraction angle in three transparent media a,b,c are 25 degree,30 degree,35 degree respactively . in which medium is the speedof light minimum and in which medium maximum???