Two thin symmetric glass lenses, one biconvex and the other biconcave, are brought into contact to make a system with optical power 1060 0 50 D Newton 's rings are observed in reflected light with wavelength 0 61m Determine (a) The radius of the tenth dark ring (b) How the radius of that ring will ...

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Two thin symmetric glass lenses, one biconvex and the other biconcave, are brought into contact to make

Question:

Two thin symmetric glass lenses, one biconvex and the other biconcave, are brought into contact to make a system with optical power Ф = 0.50 D. Newton's rings are observed in reflected light with wavelength λ = 0.61μm. Determine:
(a) The radius of the tenth dark ring;
(b) How the radius of that ring will change when the space between the lenses is filled up with water.