^Polishing lenses
^Polishing lenses When a mirror is polished it becomes a mirror of focal length ‘f’ given by Here f1 & […]
Entries by kp-web-admin
^Displacement method
^Displacement method This method is used in the labs to find the focal length of a convex lens. Consider an […]
^Cutting a lens
^Cutting a lens (a) If a lens of focal length f is given a longitudinal cut (along aperture) into two […]
^Combing two convex lenses
^Combing two convex lenses 1. Consider a parallel beam of light incident on a combination of two lenses separated by […]
^Combination of lenses
^Combination of lenses Two or more lenses are combined to Increase magnification. Make final image erect. Reduce certain aberrations. If […]
^Image formation by a lens
^Image formation by a lens (a) A concave lens always form virtual, erect & diminished image irrespective of the position […]
^Image formation rules
^Image formation rules 1. A ray passing through optical center of any lens convex or concave at any angle to […]
^Curved surface refraction formula
^Curved surface refraction formula It is a general expression, applicable to both convex & concave surface, for both point & […]
^Porro – prisms
^Porro – prisms A Porro – prisms is a totally reflected is a right handed isosceles prisms having ∠C = […]
^δ without θ
^δ without θ Under this condition This combination is also called Achromatic prism combination.
