PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoSun is a good natural source of light and heat. Living things on Earth survive with the energy provided by the Sun. Let us look at a simple activity that clearly shows the converging power of a convex lens.
Important!
Perform the following activity in the sunlight. You can look at the image of the sun only when it is reflected on the screen or a wall. But, never focus the sunlight anywhere on your body or look at the sun directly as it will damage your eyes.
- A convex lens (for example, a magnifying glass) is held facing the sun.
- A sheet of paper is taken, and the sunlight is focussed on it using the lens.
- The distance of the lens is adjusted until a sharp, bright spot is formed on the paper.
Observation
At first, a real image is formed on the paper. But, after some time, the paper begins to burn due to the converging light rays of the Sun.
At first, a real image is formed on the paper. But, after some time, the paper begins to burn due to the converging light rays of the Sun.
Now, for the same experiment, a concave lens is used instead of a convex lens.
Observation
The bright spot in a diminished manner is formed on the sheet due to diverging nature of the lens.
The bright spot in a diminished manner is formed on the sheet due to diverging nature of the lens.
Like mirrors, lenses also have different nature and size for the image.
Register for free to see more content