A thin lens has a focal length f and its aperture has a diameter d. It forms an image of intensity I. Now, the outer part extending from R/...

 A thin lens has a focal length f and its aperture has a diameter d. It forms an image of intensity I. Now, the outer part extending from R/2 to R is blackened. The focal length of the lens and intensity of image becomes/remain (R = radius of aperture = d/2 )

Anonymous User Physics Ray Optics 08 May, 2020 58 views

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