Question

If iron is heated, it becomes red in colour, why it becomes red in colour ?​

Answer 1

Answer:

The reason is that heat energy is converted into light energy so when iron is heated it becomes red in colour

Answer 2

When an Iron bar is heated to a very high temperature, it initiallyg glows red and then it's temperature rises it glows white. Incandesence is heat made visible- the process of turning heat energy into light energy......

As the temperature is raised the peak moves towards and finally into the visible region.