Question

What happened to the newton's ring
when some oil is placed between glass plate and
lens? ​

Answer 1

Answer:

$\huge\bf\pink{ąŋʂῳɛr }$

Explanation:

When a drop of water is introduced between the glass plate and a convex lens then the refractive index of the medium between them increases. So the ring system contracts in Newton's ring system.

$\huge{\textbf{\textsf{\color{navy}{}{\purple{hope}{\pink{it}{\color{pink}{helps}}}}}}}$

Answer 2

Answer:

The central fringe becomes white because this condition satisfies maxima at the center