Figure (a) shows a lens with radius of curvature R = 268 mm lying on a flat glass plate and illuminated from above by light with wavelength A. Figure (b) (a photograph taken from above the lens) shows that circular interference fringes (called Newton's rings) appear, associated with the variable thickness d of the air film between the lens and the plate. Find the radius rof the interference maxima (m = 1, A - 569 nm) assuming r/R<< 1. Incident light Air Glass Glass (a) Number Units
Figure (a) shows a lens with radius of curvature R = 268 mm lying on a flat glass plate and illuminated from above by light with wavelength A. Figure (b) (a photograph taken from above the lens) shows that circular interference fringes (called Newton's rings) appear, associated with the variable thickness d of the air film between the lens and the plate. Find the radius rof the interference maxima (m = 1, A - 569 nm) assuming r/R<< 1. Incident light Air Glass Glass (a) Number Units
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Transcribed Image Text:Figure (a) shows a lens with radius of curvature R = 268 mm lying on a flat glass plate and illuminated from above by light with
wavelength A. Figure (b) (a photograph taken from above the lens) shows that circular interference fringes (called Newton's rings)
appear, associated with the variable thickness d of the air film between the lens and the plate. Find the radius rof the interference
maxima (m = 1, A = 569 nm) assuming r/R << 1.
Incident
light
Glass
Air
Glass
(a)
(b)
Number
i
Units
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