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In Newtons Ring Experiment, First red colour is used and then blue. Which set of rings will have larger diameters?

Mumbai university > FE > SEM 2 > Applied Physics II

Marks: 3M

Year: May 2013

1 Answer
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The expression for diameter in Newton’s Ring experiment is given by:-

Dn=(2n1)2λR .....For bright ring

Dn=4nλR .....For dark ring

Dnλ

Red colour has greater wavelength than blue colour, the diameter of red coloured ring will be greater than blue coloured ring.

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