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A Newton's rings set up is used with a source emitting two wavelength $\lambda_{1}$=6000A$^{\circ}$ and $\lambda_{2}$=4500A$^{\circ}$.
written 5.3 years ago by | modified 4.1 years ago by |
It is found that nth dark ring due to 6000A° coincides with (n+2)th dark ring due to 4500A°. If the radius of curvature of the lens is 90 cm, find the diameter of nth dark ring for 6000A°.
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