White light is what the eye sees when wavelengths of all colours reach the eye.
It is a combination of Red, Blue and Green wavelengths of light, that is perceived as white.
When magnesium ion doesn't give any characteristics colour with the flame test as electronic transisitons do not give out visible light.
Everything requires energy to move. If the desk is moving, then it has energy.
Both are mainly composed of droplets of condensed water
