The heat produced at a point due to concentration of sunlight by a convex lens burns a paper. (a) Explain why it happens. (b) Name the term (in the context of the lens used) given to the point at which the paper starts burning. What does the bright spot formed on the paper represent?
The heat produced at a point due to concentration of sunlight by a convex lens burns a paper. (a) Explain why it happens. (b) Name the term (in the context of the lens used) given to the point at which the paper starts burning. What does the bright spot formed on the paper represent?
(a) The heat produced at a point due to concentration of sunlight by a convex lens burns a paper because the convex lens converges the sunlight at a point, increasing the intensity of the light and resulting in heat production.
(b) The term given to the point at which the paper starts burning is the principal focus of the lens. The bright spot formed on the paper represents the image of the Sun.
Analysis & Explanation
The convex lens converges the sunlight at a point, increasing the intensity of the light and resulting in heat production. The principal focus of the lens is the point at which the paper starts burning. The bright spot formed on the paper represents the image of the Sun.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2024?
This question carries 2 marks in the CBSE Class 10 Science 2024 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Light — Reflection and Refraction" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Refraction" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2024 paper?
This is a Very Short Answer question from Section B in the CBSE Class 10 Science 2024 paper.