Answer the following question giving explanations wherever necessary.
Lightning 'and thunder take place in sky and at tlie same distance from us. Explain why-lightning is seen earlier and thunder is heard later.

Explanation

) The speed of light (3 `xx` 10 ms is very large (about 1 million times) in comparison to the speed of sound (330 `ms^(-1)`) in air. That is why lightning is seen earlier and thunder.is heard later.