Recent content by matej1408

in my textbook is solved by derivation of lensmaker's formula, but i want to know why my solution isn't correct

Homework Statement I need to find optical power (reciprocal focal length) of this system with thin lens Homework Equations I tried to solve this using spherical diopter equation n1/a+n2/b=(n2-n1)/R where a is object distance and b is image distance The Attempt at a Solution equation for...

I see where i was wrong, I assumed that there is just one layer but there isn't, thank you TSny. Coil has some resistance and when is connected to DC there is no voltage change=> current is constant

I found two ways to solve this problem, but I get two different solutions, it's confusing because I can't see the flaw in wrong solution. 1. Homework Statement Long cylindrical inductor of diameter D1 and inductance L1 is connected to battery and creates magnetic field B1. Inductor is then...