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Find the focal length of the lens shown ...

Find the focal length of the lens shown in the figure. The radii of curvature of both the surfaces are equal to R

Text Solution

Verified by Experts

The correct Answer is:
`(mu_(3)R)/(mu_(3)-mu_(1))`
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Find the focal length fo the lens shown in the figure.

Find the focal length of the lens shown in Fig . The radii of curvature of both the surfaces are equal to R.

Knowledge Check

  • The effective focal length of the lens combination shown in Fig. is -60 cm . The radii of curvature of the curved surfaces of the plano-convex lenses are 12 cm each and refractive index of the material of the lens is 1.5 . The refractive index of the liquid is : .

    A
    1.33
    B
    1.42
    C
    1.53
    D
    1.6

  • Assertion : The focal length of an equiconvex lens placed in air to radius of curvature of either face. Reason : For an equiconvex lens radius of curvature of both the faces is same.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true and reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

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    In the figure, light is incident on a thin lens as shown. The radius of curvature for both the surfaces is R. Determine the focal length of this system.

    Find the magnitude of the chromatic aberrations of a lens made of flint glass, if the radii of curvature of both its surfaces are 0.5 m.We define the chromatic aberration as the difference between the focal lengths for the red and the violet rays. Find the ratio of the chromatic aberration to the average focal length of the lens.

    The focal length of an equiconvex lens is equal to radius of curvature of either surface. What is the refractive index of the material of the prism ?

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