In a Newton’s rings experiment, light of wavelength λ and a lens of radius of curvature R are used. The radius of 5th bright ring is n times the radius of the 2nd bright ring. Then n is:

In a Newton’s rings experiment, light of wavelength λ and a lens of

1.	In a Newton’s rings experiment, light of wavelength λ and a lens of radius of curvature R are used. The radius of 5th bright ring is n times the radius of the 2nd bright ring. Then n is:
A.	\(\sqrt 2\)
B.	\(\sqrt 3\)
C.	\(\sqrt 5\)
D.	\(\sqrt 7\)
Answer» C. \(\sqrt 5\)

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In a Newton’s rings experiment, light of wavelength λ and a lens of radius of curvature R are used. The radius of 5th bright ring is n times the radius of the 2nd bright ring. Then n is:

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