365 days
30 days
changing continuously
24 hours
The phenomenon of change in direction of light when it passes from one medium to another is called
The phenomenon of light related with the appear-ance of blue colour of the sky is
The phenomenon of total internal reflection may occur when light is passing from
The photo-oxidation process is initiated by
The pitch of sound depends on its
The pitch of sound is measured by its
The point at which the solid, liquid and gaseous forms of a substance co-exist is called its
The point where total mass of a body is supposed to be concentratedis known as
The power factor at resonance in R-L-C parallel circuit is
The power of a convex lens is +2.5. Then its focal length is
