Question

When sunlight passes through the window of your house, the dust particles scatter the light making the path of the light visible. This phenomenon is called as:

• A. Brownian motion
• B. Tyndall effect
• C. Raman effect
• D. Uniform motion

Hint:

The Tyndall effect is responsible for the visible beams of light that can be seen when light passes through dusty air.

Answer 1

The Correct Option is B

• Option 1: Brownian motion - This is incorrect. Brownian motion refers to the random movement of colloidal particles suspended in a medium, not the scattering of light.
• Option 2: Tyndall effect - This is the correct answer. The Tyndall effect refers to the scattering of light by colloidal particles or small particles in a medium. This is what makes the path of light visible when dust particles scatter sunlight.
• Option 3: Raman effect - The Raman effect refers to the scattering of light in which there is a shift in the wavelength of light due to interactions with molecules. This is not the phenomenon described here.
• Option 4: Uniform motion - This is incorrect. Uniform motion refers to motion at a constant speed in a straight line, which does not relate to the scattering of light.

Explanation:

The phenomenon described is called the Tyndall effect. It occurs when light is scattered by small particles or colloidal particles, making the path of light visible. In the case of sunlight passing through a window, dust particles scatter the light, which is why we can see the beam of light.