Q. What is solid angle?- Published on 11 Aug 15a. the ratio of spherical surface enclosed by a cone, with its vertex at the centre of sphere, to the radius of the sphere
b. the ratio of spherical surface enclosed by a cone, with its vertex at the centre of sphere, to the square of the radius of the sphere
c. the ratio of spherical surface enclosed by a cone, with its vertex at the centre of sphere, to the cube of the radius of the sphere
d. the ratio of spherical surface enclosed by a cone, with its vertex at the centre of sphere, to the fourth power of the radius of the sphere
ANSWER: the ratio of spherical surface enclosed by a cone, with its vertex at the centre of sphere, to the square of the radius of the sphere