When light travels from one medium to another medium then:
Incident ray, normal at the point of incidence and refracted ray all are in the same plane.
Incident ray, normal at the point of incidence and reflected ray are in the same plane.
Incident ray, normal at the point of incidence and emerged ray, all are in the separate plane.
Incident ray, normal at the point of incidence and refracted ray are in different planes.
Which of the following statements is true about the nature of roots for the equation x2+x+12=0?
Both roots are positive real
One root is imaginary, and one is real
Both roots are negative real
Both roots are imaginary or non-real