Explanation: When the light is transmitted through an object with a density different from air's such as glass, the process of refraction takes place. Light travels at different speeds in different medium because of the varying densities and thus refraction takes place.
Reflection is the the return of sound or light energy from the surface without absorbing it.
Diffraction is the phenomenon which occurs when the wave encounters an obstacle.
the intellectual and practical activity encompassing the systematic study 9f structure and behavior of the physical and natural world through observation and experiment
