Chapter Name: Refraction of Light At Plane Surfaces
Activity Name: Position and nature of image formed by glass slab 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.
Note down your observations in table format:
- 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.