(i) Hemispherical shape of radius R

(ii) Two concentric cylinders

i)for shape factor of hemispherical shape of radius R We have to consider two surface first one is base circular surface and dome shape surface

Surface 1 is flat and thus $F_11$=0

From summation rule :$F_11$+$F_12$=1→$F_12$=1

From reciprocity rule: $A_1$ …