I need some help with finding the focal length of a double convex lens. If possible could you tell me the formula for finding it. Many thanks…
You’ll need to know a few parameters for the lens. Specifically the radii of curvature of the two surfaces and their separation.
Use the formula found here http://en.wikipedia.org/wiki/Lens_(optics)#Lensmaker.27s_equation
If d is small compared to the radii of curvature then the last term in the equation can be ignored.
You’ll need to know a few parameters for the lens. Specifically the radii of curvature of the two surfaces and their separation.
Use the formula found here http://en.wikipedia.org/wiki/Lens_(optics)#Lensmaker.27s_equation
If d is small compared to the radii of curvature then the last term in the equation can be ignored.
References :