The cause of Tyndall effect is

Tyndall effect is dependent on particle size. as the size of colloidal particles are big enough to scatter light, so Tyndall effect is observed.

The Cause of the Tyndall Effect

The Tyndall Effect is an optical phenomenon that occurs when light passes through a colloid—a type of mixture where one substance is dispersed in another. This effect was first observed by the scientist John Tyndall and has since been named after him. The cause of the Tyndall Effect lies in the size of particles in the colloid (option d).

Why Does the Tyndall Effect Occur?

The Tyndall Effect is caused by particle size within a colloidal mixture. When light encounters particles that are larger than individual molecules but small enough to remain suspended in the mixture, these particles scatter the light. This scattering makes the light path visible to the human eye.

In simpler terms, the size of particles allows them to interact with the light waves. This interaction causes the light to bounce off the particles, illuminating the light path within the colloid.

Daily Life Examples of the Tyndall Effect

The Tyndall Effect can be observed in many everyday scenarios. Here are some examples:

• Sunlight through Fog or Mist: When sunlight shines through fog or mist, the water droplets scatter the light. This scattering makes the sunlight beams visible, highlighting the Tyndall Effect.
• Dust in a Dark Room: In a dark room with a beam of sunlight entering through a window, the dust particles in the air scatter the light, making the beam of light visible.
• Headlights in Fog: When car headlights are used during foggy conditions, fog particles scatter the light, causing the light beam to be visible and creating glare.

In all these cases, the size of particles (such as dust or water droplets) is ideal for light scattering, which is the primary cause of the Tyndall Effect.