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IFoS · Paper I · Waves & Opticsifos-2022-subject-02-004

Newton’s rings — UPSC Physics Optional IFoS 2022 Paper I

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In a Newton's ring experiment, explain the following :

(i) Why are the fringes circular ?

(ii) Why is the central spot dark as seen by reflection ?

(iii) How can one obtain Newton's ring with bright centre ?

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