A large magnification can be achieved in an astronomical telescope by taking an objective lens of highest possible focal length and an eyepiece of least possible focal length. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
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A convex lens of least possible focal length so that its magnifying power is high. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
The refractive index of prism material differs from colour to colour and angle of deviation ‘δ’ a light ray undergoing refraction through a prism depends on its refractive index. Thus, angle deviation is different for different colours of light. Class ...
Angle of minimum deviation of light ray from a glass prism increases with increase in refractive index. As refractive index of glass for violet light is more than that for red light, (11> 1) the angle of minimum deviation for ...
On the material of the prism and the wavelength of light used. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.