jee_main_2025_08_april_evening - Ray Optics Topics

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QUESTION #0 Refraction through Lenses
A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30~cm and 20~cm, respectively. The concave surface is upwards and is filled with a liquid of refractive index 1.3. The focal length of the liquid-glass combination will be
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QUESTION #12 Refraction through Lenses
A convex lens of focal length 30~cm is placed in contact with a concave lens of focal length 20~cm. An object is placed at 20~cm to the left of this lens system. The distance of the image from the lens in ~cm is:
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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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