When a thin sheet of a transparent material of thinkness `7.2xx10^(-4)`cm is introduced in the
Channel: Doubtnut
Date: 2021-11-08

When a thin sheet of a transparent material of thinkness `7.2xx10^(-4)`cm is introduced in the path one of the interfering beams, the central fringe shift to a position occupied by the sixth bright fringe. If `lambda=6xx10^(-5)` cm, find the refractive index of the sheet.