Question

Show that the family of spheres x^2 + y^2 + (z-c)^2 = r^2 satisfy the 1st Order partial differential yp-xq=0​

Answer 1

Answer:

ans is this

Step-by-step explanation:

According to the law of refraction angle of incidence will be equal to angle of emergence

therefore angle of emergence will be 30

and in second case it will be 45