Common daily life science queries – 2

Q 4: Why is flash of lightening seen before the sound of the cloud thunder?

Answer: If you know that nothing can travel faster than the speed of the light that is 3 x 108 m/s, then you know the answer. As light travels faster than the sound, therefore we see the flash of lightening before the sound of the thunder.

Q 5: Why a wet cloth is placed on the forehead of a patient having high fever? Continue reading “Common daily life science queries – 2”