You observe, at normal incidence, light of wavelength 483 nm reflected off the (air) interface between a plano-convex lens (curved side down) touching a flat piece of glass. You see a dark central spot surrounded by rings of darkness. The smallest ring has radius 187 μm. If the lens is made of glass with refractive index 1.532, what is the focal length of the lens in cm?
You observe, at normal incidence, light of wavelength 483 nm reflected off the (air) interface between a plano-convex lens (curved side down) touching a flat piece of glass. You see a dark central spot surrounded by rings of darkness. The smallest ring has radius 187 μm. If the lens is made of glass with refractive index 1.532, what is the focal length of the lens in cm?
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You observe, at normal incidence, light of wavelength 483 nm reflected off the (air) interface between a plano-convex lens (curved side down) touching a flat piece of glass. You see a dark central spot surrounded by rings of darkness. The smallest ring has radius 187 μm. If the lens is made of glass with refractive index 1.532, what is the focal length of the lens in cm?
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