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Principal Focus and Focal Length of a Concave Lens | Class 10 Physics

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Magnet Brains

CBSE ( Class 10 )

110,519 views 3,065 202 26:16

en hi

👉 Previous Video: https://www.youtube.com/watch?v=_-WCzq_ZLgg 👉 Next Video: https://www.youtube.com/watch?v=pEPLL3MX5-o ✔️📚👉 Watch Full Free Course: https://www.magnetbrains.com ✔️📚👉 Get Any Class & Subject's Topic Video Here:- https://www.magnetbrains.com/get-topic-wise-video ✔️📚👉 Get All Subjects Playlists: https://www.pabbly.com/out/all-videos-playlist ✔️📚👉 Grab Notes by Expert Teachers Here: https://www.pabbly.com/out/magnet-brains ✔️📚👉 Get E-Books Prepared by Our Expert Teachers: https://www.magnetbrains.com/book_purchase =============================================== 📢 Full Playlist Link: https://www.youtube.com/playlist?list=PLVLoWQFkZbhXAipqg8dmzLQOED1uxgUTx ✅ In this video, ✔️ Class: 10th ✔️ Subject: Physics ✔️ Chapter: Light: Reflection And Refraction (Chapter 10) ✔️ Topic Name: Principal Focus And Focal Length of A Concave Lens - Light: Reflection And Refraction | Class 10 Physics Chapter 10 ✔️ Topics Covered In This Video (by Vibhuti Ma'am): In this YouTube video, Vibhuti Mam will discuss the principal focus and focal length of a concave lens, a key concept covered in Class 10 Science (Physics Chapter 10). We will learn how to calculate parameters such as the principal focus, and focal length, and gain a better understanding of how light behaves when it is reflected or refracted through a concave lens. Ultimately, the video will assist viewers in mastering the topics covered by Class 10 Physics. =============================================== 00:00 Introduction: Light: Reflection And Refraction 00:14 Principal Focus And Focal Length of A Concave Lens 25:23 Website Overview =============================================== Why study from Magnet Brains? Magnet Brains is an online education platform that helps give You NCERT/CBSE curriculum based free full courses from Kindergarten to Class 12th so that you can perform well in any and all exams you give in your academic career. 👉 Contact us 🤑🤑 ➡️ Connect with us : [email protected] ➡️ Website : https://www.magnetbrains.com ➡️ Subscribe to us on YouTube: https://www.youtube.com/channel/UC3HS6gQ79jjn4xHxogw0HiA?sub_confirmation=1 ➡️ Subscribe to Magnet Brains Hindi Medium : https://www.youtube.com/channel/UCwO6AYOIRYgyP1KJ5aPbDlw?sub_confirmation=1 ➡️ Facebook : https://www.facebook.com/Magnet-Brains-Education-110955641184512 ➡️ Instagram : https://www.instagram.com/magnetbrains/ ➡️ Telegram : https://t.me/magnetbrainsbhopal Points covered in this video:- Principal Focus and Focal Length of a Concave Lens - First Principal Focus: - First principal focus of a concave lens is the virtual position of a point object on the principal axis of the lens, for which the image formed by the concave lens is at infinity. - First principal focus of concave lens is represented by the point F1. - The rays falling on concave lens tend to converge to a point F1 on the principal axis of concave lens. - Before actually meeting at F1, these rays are intercepted by concave lens, which refracts them into beam parallel to the principal axis of concave lens. - They would form the image at infinity. - Thus F1 is virtual position of the point object, whose image would be formed at infinity. - The distance of first principal focus of the lens from optical centre O of the lens is called first principal focal length of concave lens. - It is represented by f1. - Thus, OF1 = f1. Second Principal Focus: - Second principal focus of a concave lens is the position of image point on the principal axis of the lens, when the point object is situated at infinity. - Second principal focus of concave lens is represented by the point F2. - Rays from an object at infinity fall on concave lens in a direction parallel to the principal axis of the lens. - On refraction through concave lens, they diverge as shown. - On producing back, the diverged rays appear to come from a point F2 on the principal axis of the lens, where a virtual point image would be formed. principal focus and focal length of a concave mirror class 10 class 10 science light reflection and refraction notes what is focal length class 10 light chapter class 10 pdf light reflection and refraction pdf ncert class 10 science chapter 10 pdf ncert class 10 science chapter 10 exercise solutions light reflection and refraction class 10 exercise answers #focallength #class10light #lightreflection #class10physics #class10science #magnetbrains Disclaimer: "This video is for educational and informational purposes only and is not intended to infringe on any copyrights. If you believe that this video has used any copyrighted material in a way that constitutes copyright infringement, please contact us at [email protected] and we will take appropriate action."

👉 Previous Video: https://www.youtube.com/watch?v=_-WCzq_ZLgg 👉 Next Video: https://www.youtube.com/watch?v=pEPLL3MX5-o ✔️📚👉 Watch Full Free Course: https://www.magnetbrains.com ✔️📚👉 Get Any Class & Subject's Topic Video Here:- https://www.magnetbrains.com/get-topic-wise-video ✔️📚👉 Get All Subjects Playlists: https://www.pabbly.com/out/all-videos-playlist ✔️📚👉 Grab Notes by Expert Teachers Here: https://www.pabbly.com/out/magnet-brains ✔️📚👉 Get E-Books Prepared by Our Expert Teachers: https://www.magnetbrains.com/book_purchase =============================================== 📢 Full Playlist Link: https://www.youtube.com/playlist?list=PLVLoWQFkZbhXAipqg8dmzLQOED1uxgUTx ✅ In this video, ✔️ Class: 10th ✔️ Subject: Physics ✔️ Chapter: Light: Reflection And Refraction (Chapter 10) ✔️ Topic Name: Principal Focus And Focal Length of A Concave Lens - Light: Reflection And Refraction | Class 10 Physics Chapter 10 ✔️ Topics Covered In This Video (by Vibhuti Ma'am): In this YouTube video, Vibhuti Mam will discuss the principal focus and focal length of a concave lens, a key concept covered in Class 10 Science (Physics Chapter 10). We will learn how to calculate parameters such as the principal focus, and focal length, and gain a better understanding of how light behaves when it is reflected or refracted through a concave lens. Ultimately, the video will assist viewers in mastering the topics covered by Class 10 Physics. =============================================== 00:00 Introduction: Light: Reflection And Refraction 00:14 Principal Focus And Focal Length of A Concave Lens 25:23 Website Overview =============================================== Why study from Magnet Brains? Magnet Brains is an online education platform that helps give You NCERT/CBSE curriculum based free full courses from Kindergarten to Class 12th so that you can perform well in any and all exams you give in your academic career. 👉 Contact us 🤑🤑 ➡️ Connect with us : [email protected] ➡️ Website : https://www.magnetbrains.com ➡️ Subscribe to us on YouTube: https://www.youtube.com/channel/UC3HS6gQ79jjn4xHxogw0HiA?sub_confirmation=1 ➡️ Subscribe to Magnet Brains Hindi Medium : https://www.youtube.com/channel/UCwO6AYOIRYgyP1KJ5aPbDlw?sub_confirmation=1 ➡️ Facebook : https://www.facebook.com/Magnet-Brains-Education-110955641184512 ➡️ Instagram : https://www.instagram.com/magnetbrains/ ➡️ Telegram : https://t.me/magnetbrainsbhopal Points covered in this video:- Principal Focus and Focal Length of a Concave Lens - First Principal Focus: - First principal focus of a concave lens is the virtual position of a point object on the principal axis of the lens, for which the image formed by the concave lens is at infinity. - First principal focus of concave lens is represented by the point F1. - The rays falling on concave lens tend to converge to a point F1 on the principal axis of concave lens. - Before actually meeting at F1, these rays are intercepted by concave lens, which refracts them into beam parallel to the principal axis of concave lens. - They would form the image at infinity. - Thus F1 is virtual position of the point object, whose image would be formed at infinity. - The distance of first principal focus of the lens from optical centre O of the lens is called first principal focal length of concave lens. - It is represented by f1. - Thus, OF1 = f1. Second Principal Focus: - Second principal focus of a concave lens is the position of image point on the principal axis of the lens, when the point object is situated at infinity. - Second principal focus of concave lens is represented by the point F2. - Rays from an object at infinity fall on concave lens in a direction parallel to the principal axis of the lens. - On refraction through concave lens, they diverge as shown. - On producing back, the diverged rays appear to come from a point F2 on the principal axis of the lens, where a virtual point image would be formed. principal focus and focal length of a concave mirror class 10 class 10 science light reflection and refraction notes what is focal length class 10 light chapter class 10 pdf light reflection and refraction pdf ncert class 10 science chapter 10 pdf ncert class 10 science chapter 10 exercise solutions light reflection and refraction class 10 exercise answers #focallength #class10light #lightreflection #class10physics #class10science #magnetbrains Disclaimer: "This video is for educational and informational purposes only and is not intended to infringe on any copyrights. If you believe that this video has used any copyrighted material in a way that constitutes copyright infringement, please contact us at [email protected] and we will take appropriate action."

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