Infinite (or power is zero). Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
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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.
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.
When light travels from a rarer to a denser medium, the speed decrease, but energy carried by the light wave remains unchanged. Energy of light depends on its frequency and number of light photons in given light beam and both ...
When an object is placed between f and 2f of a concave mirror, the image formed is (i) real, and (ii) magnified. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.