Physics Practicals Class 10

# Scattering of Light Through Colloidal Solution

• Teach science experiments in a gamified way
• Boost conceptual clarity and knowledge retention
• Aligned with National Education Policy 2020
• Helpful in getting NAAC accreditation
• CBSE, ICSE, and state boards aligned curricula
• Engaging simulations with easy-to-teach instructions

• Simulation models of light scattering through colloidal solutions aim to replicate the behavior of light as it interacts with particles suspended in a liquid medium, providing insights into the phenomenon of scattering and its applications.
• These models typically simulate the colloidal solution as well as the incident light source, considering parameters such as particle size, concentration, and refractive indices of the particles and the medium.
• They illustrate how incident light interacts with particles in the colloidal solution, leading to scattering in various directions due to refraction, diffraction, and reflection at the particle interfaces.
• Users can engage in interactive experiments to understand the principles underlying light scattering, observing how different factors such as particle size and concentration affect the scattering pattern.

• By manipulating parameters such as particle size distribution and solution concentration, users can observe changes in the scattering intensity, scattering angle distribution, and the appearance of Tyndall or Rayleigh scattering phenomena.
• These simulations offer visualizations of the scattering process, allowing users to observe how light propagates through the colloidal solution and how the scattered light contributes to the observed optical properties.
• Users gain practical insights into concepts such as Rayleigh scattering, Mie scattering, and the relationship between particle size and scattering efficiency.

### Simulation Details

Duration – 30 Minutes
Easily Accessible
Languages – Odia & English
Platforms – Android & Windows

Description

Scattering of Light
The path of a beam of light passing through a true solution is not visible. However, its path becomes visible through a colloidal solution where the size of the particles is relatively larger.

Rayleigh’s Scattering Law
According to Rayleigh’s scattering law, the amount of scattering of the light is inversely proportional to the fourth power of the wavelength.

Tyndall Effect
The Earth’s atmosphere is a heterogeneous mixture of minute particles. These particles include smoke, tiny water droplets, suspended particles of dust, and molecules of air. When a beam of light strikes such fine particles, the path of the beam becomes visible. The light reaches us, after being diffusely reflected by these particles. The phenomenon of scattering of light by the colloidal particles gives rise to the Tyndall effect.

### Requirements for this Science Experiment

• Torch
• Cardboard
• Torch stand
• Glass beaker
• Converging lens
• Sodium thiosulphate
• HCl
• Dropper
• Spatula
• Wooden board with hole

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