On passing light from colloidal solution, the effect due to scattering of light is known as :

Options

A. Electrophoresis
B. Tyndall effect
C. Electro-osmosis
D. Coagulation

Answer

To solve the question, "On passing light from colloidal solution, the effect due to scattering of light is known as:", we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks about the effect observed when light passes through a colloidal solution, specifically focusing on the scattering of light.

2. **Analyzing the Options**:
- **Option A: Electrophoresis**: This is a technique used to separate molecules based on size and charge using an electric field. It does not relate to the scattering of light.
- **Option B: Tyndall Effect**: This effect occurs when light is scattered by particles in a colloidal solution, making the path of the light visible. It is specifically associated with colloidal solutions and fine suspensions.
- **Option C: Electroosmosis**: This refers to the movement of liquid through a porous material under the influence of an electric field. It does not pertain to light scattering.
- **Option D: Coagulation**: This process involves the aggregation of colloidal particles into larger particles, leading to precipitation. It is not related to the scattering of light.

3. **Identifying the Correct Answer**:
Among the options analyzed, **Option B: Tyndall Effect** is the correct answer. The Tyndall Effect describes the scattering of light by colloidal particles, which makes the light beam visible in the colloidal solution.

4. **Conclusion**:
Therefore, the effect due to scattering of light when passing through a colloidal solution is known as the **Tyndall Effect**.

### Final Answer:
The effect due to scattering of light on passing through a colloidal solution is known as the **Tyndall Effect**.