Question

Would a biconvex refractive index lens n = 1,250, immersed in air, be convergent or divergent? And if it is submerged in water n = 1,333)? Explain why many people have difficulty seeing underwater. Why do diving glasses help?

When an AC generator is connected to an LRC circuit, in the end where does the energy come from? Where is it going? How do the values ​​of L, R and C affect the energy supplied by the generator?

Answer 1