Saved Bookmarks
| 1. |
Explain the refraction of plane wavefront of light through a convex lens. |
Answer» Solution : Let AB represent a plane wavefront. The SECONDARY WAVELETS from A and B reach the points A' and B' respectively in same the time as the secondary wavelets reach from `P_1 and P_2` . Thus the points `A', P_2 and B'` are in the same phase. This explains why a parallel BEAM of LIGHTS on refraction through a convex lens gets converged and gives a spherical wavefront, WHEREAS the plane wavefront diverges in the case of concave lens. |
|