The act of making something right or accurate.

सुधारना

English Usage: The teacher made a correction on my assignment to clarify the instructions.

Hindi Usage: शिक्षक ने मेरे असाइनमेंट पर निर्देशों को स्पष्ट करने के लिए सुधार किया.

The bending of light as it passes from one medium to another.