Difference between physical optics and geometric optics
| Geometric optics | Physical Optics |
| Light is treated as a single beam (A ray) and study the properties | Light is treated as wave and the study of wave like properties of light |
| It deals with lenses, mirrors, phenomenon of total internal reflection, formation of rainbows, etc | deal with Young’s double slit experiment ,polarization and Diffraction, which are wave like properties |
| In this case, the wavelike properties of light become insignificant as the objects we deal with are very huge as compared to the wavelength of light. | In this case ,object size is comparable with wavelength of light |