A virtual and erect image is formed exactly between optical centre and the principal focus on that very side of the concave lens. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
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The phenomenon of total internal reflection of light. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
As refractive index of diamond is much greater hence critical angle for diamond-air interface is quite small. Thus, a diamond cutter has large options to cut the diamond faces so that light suffers total internal reflection from these faces.
(1) The ray of light should travel in the optically denser medium towards the rarer medium. (ii) The angle of incidence at the refractive surface should be greater than the critical angle for given pair of media. Class 12 Physics ...
sinic = 1/n , where n = refractive index of the denser media w.r.t. the rarer medium. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.