Chapter Name: Refraction of Light At Plane Surfaces
Activity Name: Different view with coin in water in Refraction of Light At Plane Surfaces
Investigate the formation of an image of a coin at the bottom of a cylindrical transparent vessel when viewed from the water’s surface. Understand the principles of refraction and total internal reflection.
- Cylindrical transparent vessel (1 L beaker can be used)
Step by Step Procedure:
- Take the cylindrical transparent vessel or a 1 L beaker.
- Place a coin at the bottom of the vessel.
- Carefully pour water into the vessel until the coin is no longer visible from the side but forms an image on the water’s surface.
- Observe the formed image of the coin on the water surface.
- The coin becomes invisible when viewed from the side of the vessel due to refraction.
- An image of the coin is formed on the water’s surface due to the bending of light rays as they pass from water to air.
- Handle the vessel and water carefully to avoid spills and accidents.
- Make sure the coin is clean and free from any substances that may affect the experiment.
- Perform the experiment in a well-lit area to clearly observe the image formation.
Lesson Learnt from Experiment:
The experiment demonstrates the phenomenon of refraction of light at a plane surface, which causes the image of the coin to form on the water’s surface. It also provides a practical example of total internal reflection, which plays a role in various natural occurrences, such as mirages observed during hot summer days.