Power of Lens - Light–Reflection and Refraction | Class 10 Physics Chapter 9 | CBSE 2024-25
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✔️ Class: 10th
✔️ Subject: Physics
✔️ Chapter: Light–Reflection and Refraction (Chapter 9)
✔️ Topic Name: Power of Lens
✔️ Topics Covered In This Video (By Tazmeen Ma'am): In this captivating video, Ma'am focuses on the topic 'Power of Lens' within Chapter 9 - "Light–Reflection and Refraction." Dive deep into the fascinating world of science as we explore key concepts vital for success in your studies. Join us as we simplify complex topics and make learning fun and engaging for all Class 10 students.
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00:00 Introduction: Light–Reflection and Refraction - Power of Lens
01:43 Power of Lens
09:22 Questions from other sources: Que. 1 A convex lens is of focal length 10 cm. What is its power?
12:37 Que. 2 A person having a myopic eye uses a concave lens of focal length 50 cm. What is the power of the lens?
15:33 Que. 3 A thin lens has a focal length of, -25 cm. What is the power of the lens, and what is its nature?
17:35 Que. 4 The power of a lens is + 2.5 D. What kind of lens it is, and what is its focal length?
19:37 Que. 5 A lens has a power of, -2.5 D. What is the focal length and nature of the lens?
21:05 Que. 6 Find the power of a concave lens of focal length 2 m.
22:05 Que. 7 A convex lens forms a real and inverted image of a needle at a distance of 50 cm from the lens. If the image is of the same size as the needle, where is the needle placed in front of the lens? Also, find the power of the lens.
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