Formation of grains of sulphur in Human Eye and Colourful World – Class 10 Science Experiment

Chapter Name: Human Eye and Colourful World

Activity Name: Formation of grains of sulphur in Human Eye and Colourful World

Activity Description:

This experiment aims to observe the formation of grains of sulphur through a chemical reaction between sodium-thio-sulphate (hypo) and sulphuric acid in the presence of sunlight. The experiment also demonstrates the phenomenon of light scattering and its impact on the color perception of the sulphur grains.

Required Items:

  1. Sodium-thio-sulphate (hypo) solution
  2. Sulphuric acid
  3. Glass beaker
  4. Access to an open place with abundant sunlight

Step by Step Procedure:

  1. Take a glass beaker and pour the sodium-thio-sulphate (hypo) solution into it.
  2. Add some sulphuric acid to the beaker.
  3. Place the beaker in an open area where there is ample sunlight.
  4. Observe the changes in the beaker and the formation of grains of sulphur as the reaction progresses.

Experiment Observations:

  • Sulphur precipitates as the reaction proceeds.
  • Initially, the grains of sulphur are small in size and appear blue in color due to their size being comparable to the wavelength of blue light.
  • As the reaction continues, the size of sulphur grains increases, and their color changes to white due to scattering of light.
  • The larger grains act as scattering centers for other colors, resulting in a combination of all colors, which appears white.


  1. Handle sulphuric acid with care, as it is a corrosive and dangerous substance. Wear appropriate protective gear such as gloves and goggles.
  2. Conduct the experiment in a well-ventilated area to avoid inhaling any harmful fumes.
  3. Place the beaker in a safe location where it will not be easily disturbed or knocked over.
  4. Keep children away from the experiment and provide supervision if necessary.

Lesson Learnt from Experiment:

This experiment illustrates the phenomenon of light scattering and how the size of particles can influence the colors we perceive. Initially, the smaller sulphur grains appear blue, but as they grow larger, they scatter light of various colors, resulting in the perception of white color. This experiment provides valuable insights into light interaction with matter and its effects on color appearance.

Science Experiment Kits for Kids

Photo Title Price Buy
Einstein Box Junior...image Einstein Box Junior Science Gift Set | 2-in-1 Set of My First Science Kit & Slime Kit for 4-6-8 Year Olds| Birthday Gift for Boys & Girls ₹1,199.00
ButterflyEdufields 20+ Science...image ButterflyEdufields 20+ Science Kit For Kids | STEM Projects birthday gift For Boys and Girls Ages 7-8-10-12 |DIY Educational & Learning Experiment Toys for 7 To 12 Year Olds | Build 20+ Motor Machines ₹1,699.00
The Little Ones...image The Little Ones Science Kit - Science experiment kit for kids 6-8-10-12 years old,educational learning toys,Best gift for boys&girls,chemistry kit,science project[Complete science kit- 100+experiment]
WitBlox AI Artificial...image WitBlox AI Artificial Intelligence Robotic Science Kit for 101+ Project 137 Part 8 Yrs+, Interlocking Bricks, Electronic Sensor & Circuits to create Logic 2 Free Live Classes Gift Toy for Boys & Girls ₹3,700.00
Avishkaar Robotics Advanced...image Avishkaar Robotics Advanced Kit|150-In-1 DIY Stem Metal Kit|Multicolor|150+ Parts|Learn Robotics|Coding & Mechanical Design|for Kids Aged 10-14|Made in India|Educational DIY Stem Kit|Made in India ₹10,199.00
My Science Lab...image My Science Lab Ultimate Science Experiment Kit for Kids Age 6-14 | STEM Toys | Physics Kit Set | Science & Fun 5-in-1 Projects | School Science Kit | Best Educational Birthday Gift Toys for Boys and Girls ₹1,199.00

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *