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What will be the change in focal length f of a concave mirror when immersed in a liquid of refractive index n?

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What will be the change in focal length f of a concave mirror when immerged in a liquid of refractive index n?

Define focal length of concave mirror.

Knowledge Check

  • The focal lentht of a concave mirror is

    A
    maximum for red colour
    B
    maximum for violet colour
    C
    maximum for yellow colour
    D
    equal for all colours

  • In Young's double slit experiment the magnitude of the fringe width is beta . If the whole set-up of the experiment is immersed in a liquid of refractive index mu then the magnitude of the fringe width will be

    A
    `mu beta`
    B
    `(beta)/(mu+1)`
    C
    `(beta)/(mu-1)`
    D
    `(beta)/(mu)`

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    A convex lens whose redius of curvatures of both surfaces are same, refractive index 1.5 an focal length is 15cm . If it is immerged into a liquid of refractive index 1.7 what will be the focal length of he lesns?

    If the focal length of a concave mirror be 15cm then what is its radius of curvature?

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