The power of given convex lens increases on account of the fact that fv < fr Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
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As the glass lens of refractive index n = 1.45 disappears when immersed in a liquid, hence refractive index of liquid must be same as that of lens. ∴ Refractive index of liquid = 1.45. Class 12 Physics Chapter 9 ...
Infinite (or power is zero). Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Focal length of the given lens increases in accordance with lens maker’s formula 1/f =(n-1)(1/R1 -1/R2) because Ngw <nga. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
When refractive index of liquid is exactly same as the refractive index of glass. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Focal length of a lens for red light is more than that for blue light. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
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.
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 ...