Question

In transmitted light the central fringe of the
Newton's ring is ?​

Answer 1

the center of the Newton's rings is bright in transmitted light and dark in reflection. As white light is used, the interference rings are bordered by colored fringes .

Answer 2

Answer:

• The central fringe in Newton's rings is dark in the case of the reflected system because the air film thickness formed at the centre between the glass plate and the lens is zero. Hence, at the geometrical path difference between the incident and reflected rays from the glass plate is zero.

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