06-26-2025, 01:30 PM
Below are the detailed answers to all questions and activities provided in the chapter on lenses, covering observations, numerical problems, and practical activities, formatted for clarity and exam preparation.
Some sample questions from the textbook with answers are:
Vary the distance between the paper and the glass sheet. What do you observe?
o The size of the illuminated area does not change, regardless of the distance between the paper and the glass sheet.
Do the same activity using a reading lens. What is your observation?
o When the convex (reading) lens is held at a specific distance (near its focal length), the illuminated area reduces significantly, and the light intensity increases, potentially causing the paper to smolder.
Hold the lens at that point for a longer time. Can't you see the paper smouldering and catching fire?
o Yes, the paper smolders and may catch fire because the convex lens converges sunlight to a small, intense spot, increasing the energy concentration.
For details on Textbook activities on 10th std Phyics Ch 2 Lenses click here
Kerala SSLC Physics Chapter 2 Lenses- Textbook Questions and answers.pdf (Size: 77.31 KB / Downloads: 9)
Some sample questions from the textbook with answers are:
Vary the distance between the paper and the glass sheet. What do you observe?
o The size of the illuminated area does not change, regardless of the distance between the paper and the glass sheet.
Do the same activity using a reading lens. What is your observation?
o When the convex (reading) lens is held at a specific distance (near its focal length), the illuminated area reduces significantly, and the light intensity increases, potentially causing the paper to smolder.
Hold the lens at that point for a longer time. Can't you see the paper smouldering and catching fire?
o Yes, the paper smolders and may catch fire because the convex lens converges sunlight to a small, intense spot, increasing the energy concentration.
For details on Textbook activities on 10th std Phyics Ch 2 Lenses click here
Kerala SSLC Physics Chapter 2 Lenses- Textbook Questions and answers.pdf (Size: 77.31 KB / Downloads: 9)