spherical cavity meaning in Hindi

Examples

1. In 2000 Peter R . McCullough published a modified model allowing for an evacuated, spherical cavity either centered on the star or with the star displaced with respect to the evacuated cavity.
2. In the case when the polarization is " outside " a spherical cavity, the field in the cavity due to the surrounding dipoles is in the " same " direction as the polarization.
3. At first, astronomers thought these oscillations were caused by gas currents just beneath the Sun's visible surface, but in the late 1960s, Leibacher and two other astronomers, Dr . Roger Ulrich and Dr . Robert Stein, proposed independently that the oscillations were caused by interacting sound waves trapped in the spherical cavity of the Sun, acting somewhat as do sound waves trapped in a reverberating gong.