REFRACTION IN LENS UDIT GUPTA
WELCOME TO THE 1ST LESSON! TODAY WE LEARN ABOUT TYPES OF LENS AND IN PARTICULAR ABOUT CONVEX LENS DON'T FORGET TO CHECK THE SPECIAL CLASSES! Apps Othar bookmaka unacademy Home Plas Seh Courses Top&U Browse Courses - Examinations Class 12 NTA-UGC NET GATE (Cvil RPSC CTET P SSC CGL IT JEE Bank Exams CAT UPSC CSE GATE (CS and IT) CDS/ NDA/ AFCAT CTET Exam Oriented Discussion on Numbers and Operation Soil Classification and Distribution Understanding Fluid Flow through Top Festivals and Fairs of Rajasthan Regimatu, opens at 12:00 PM ONegititon opent 12:00 PM Riatration pe 1200 21 21 21 21
LENSES IN THIS COURSE, WE ARE GOING TO STUDY LENSES HAVING SPHERICAL (OR PLANE) SURFACES AND NEGLIGIBLE THICKNESS. THESE INCLUDE CONVEX, BICONVEX, PLANO-CONVEX AND PLANO CONCAVE LENSES. Converging Diverging Biconvex Plano- convex Biconcave Positive meniscus Plano- concave Negative meniscus
CONVEX LENS . IF A BEAM OF LIGHT PARALLEL TO PRINCIPAL AXIS STRIKES CONVEX LENS, IT CONVERGES AFTER REFRACTION TO A POINT CALLED AS FOCUS (F). DUE TO THE CONVERGING EFFECT, CONVEX LENS IS ALSO CALLED A CONVERGING LENS. THE FOCUS LIES TO THE RIGHT OF LENS IF INCIDENT RAYS ARE TRAVELLING TOWARDS RIGHT. HENCE FOCAL LENGTH OF CONVEX LENS IS POSITIVE. LENSES HAVE TWO FOCI, BECAUSE LIGHT CAN STRIKE A LENS FROM BOTH THE SIDES. tve
RAY DIAGRAMS FOR CONVEX LENS SOME IMPORTANT RAYS AND THEIR PATHS AFTER REFRACTION ARE SHOWN BELOW.
RAY DIAGRAMS FOR CONVEX LENS CONSIDER A REAL LINEAR OBJECT AB PLACED AT DIFFERENT LOCATIONS IN FRONT OF A CONVEX LENS .OBJECT BEYOND 2F: OBJECT AT 2F: B' 2F 2F B' B2F FIC 2F A'
RAY DIAGRAMS FOR CONVEX LENS OBJECT BETWEEN 2F & F OBJECT AT F: Principal 2F axis A'
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