White light is the name given to visible light that contains all wavelengths of the visible spectrum at equal intensities.
- As light travels through a vacuum or a medium it is described as white light if it contains all the wavelengths of visible light.
- As light travels through the air it is invisible to our eyes.
- When we look around we see through the air because it is very transparent and light passes through it.
- The term white light doesn’t mean light is white as it travels through the air.
- One situation in which light becomes visible is when it reflects off the surface of an object.
- When white light strikes a neutral coloured object and all wavelengths are reflected then it appears white to an observer.