1. The power of a convex lens increases when red light is replaced by violet light. This is because violet light has a shorter wavelength, resulting in greater refraction and a smaller focal length, thereby increasing the lens's power. For more visit here: https://www.tiwariacademy.com/ncert-solutions/Read more

    The power of a convex lens increases when red light is replaced by violet light. This is because violet light has a shorter wavelength, resulting in greater refraction and a smaller focal length, thereby increasing the lens’s power.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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  2. The biconvex lens will become invisible when placed in a liquid with the same refractive index. This happens because there is no refraction or bending of light at the lens-liquid interface, making the lens indistinguishable. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12Read more

    The biconvex lens will become invisible when placed in a liquid with the same refractive index. This happens because there is no refraction or bending of light at the lens-liquid interface, making the lens indistinguishable.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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  3. In a liquid medium with the same refractive index as the lens (1.5), the focal length of the converging lens becomes infinite. This is because there is no refraction at the lens-liquid interface, preventing convergence of light rays. For more visit here: https://www.tiwariacademy.com/ncert-solutionsRead more

    In a liquid medium with the same refractive index as the lens (1.5), the focal length of the converging lens becomes infinite. This is because there is no refraction at the lens-liquid interface, preventing convergence of light rays.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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  4. The refractive index of the liquid is 1.45. When the glass lens disappears in the liquid, it indicates that the refractive indices of both the lens and the liquid are the same, causing no refraction at the interface. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physicsRead more

    The refractive index of the liquid is 1.45. When the glass lens disappears in the liquid, it indicates that the refractive indices of both the lens and the liquid are the same, causing no refraction at the interface.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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  5. A convex lens forms a virtual image only when the object is within its focal length. The image is upright, magnified, and on the same side as the object. A concave lens always forms a virtual image, which is upright, diminished, and on the same side. For more visit here: https://www.tiwariacademy.coRead more

    A convex lens forms a virtual image only when the object is within its focal length. The image is upright, magnified, and on the same side as the object. A concave lens always forms a virtual image, which is upright, diminished, and on the same side.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

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