Question

What happens when light is passed through a colloidal solution?

• A. Path of light through the colloid becomes invisible.
• B. Path of light through the colloid becomes visible.
• C. There's no effect.
• D. There's no scattering of light.

Answer 1

The correct option is B Path of light through the colloid becomes visible.

When a strong beam of light is passed through a colloid kept in a dark room, the path of light becomes visible through the colloid. This happens because of the scattering of light by the particles of the colloid, and this is called Tyndall effect.