A circular disc of radius 'R' is placed co-axially and horizontally inside and opaque hemispherical bowl of radius 'a', Fig. The far edge of the disc is just visible when viewed from the edge of the bowl. The bowl is filled with transparent liquid of refractive index `mu` and the near edge of the dise becomes just visible. How far below the top of the bowl is the disc placed ?
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A cicular disc of radius R is placed co-axially and horizontally inside an opaque hemi spherical bowl of radius .a. (see figure). The faredge of the disc in just visible when viewed from the edge of the bowl . The bowl is filled with transparent liquid of refractive index mu and the near edge of the disc becomes just visible. How far below the top of the bowl is the disc placed ?

A circular disc of radius R is placed co-axically and horizontally inside an opaque hemishperical bowl of radius a as shown in Fig.6.02. . The far edge of the disc is just visible,when viewed from the edge of the bowl.The bols is filled with transparent liquid of refractive index mu and the near edge of the disc becomes just visible.How far below the top of the bowl is the disc placed?

A hemispherical bowl of radius r is placed in uniform electric field E . The electric flux passing through the bowl is