centre of curvature meaning in Hindi

It measures mirror surface dimensions by reflecting light into a knife edge at or near the mirror's centre of curvature.
The observer's eye is placed close to the centre of curvature of the mirror under test looking at the mirror through the grating.
The centripetal acceleration always points towards the centre of curvature O and only changes the direction "'s "'of the forward displacement while the parcel moves on.
The Foucault tester is set up at the distance of the mirror's radius of curvature ( radius R is twice the focal length . ) with the pinhole to one side of the centre of curvature ( a short vertical slit parallel to the knife edge can be used instead of the pinhole ).

noun.