Focal length of concave mirror even in water is same at 20 cm. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
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Focal length of each part is same as that of original lens. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
n = 1.5. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Four times the focal length of the lens. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.