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The eye can be regarded as a single refr...

The eye can be regarded as a single refracting surface is equal to that of cornea (7.8 mm). This surface separates two media of refractive indices 1 and 1.34. Calculate the distance from the refracting surface at which a parallel beam of light will come to focus.

Text Solution

Verified by Experts

Using `(mu_(2))/v-(mu_(1))/u=(mu_(2)-mu_(1))/R`
R=7.8 mm


`mu_(1)=1mu_(2)=1.34`
`implies1.34/V-1/(oo)=(1.34-1)/78[ :. u=oo]`
`:.V=30.7` mm =3.07cm=3.1 cm
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Knowledge Check

  • The human eye can be regarded as a single spherical refractive surface of curvature of cornea 7.8 mm. If a parallel beam of light comes to focus at 3.075 cm behind the refractive surface, the refractive index of the eye is

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    B
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    `23.7^(@)`
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    `43.7^(@)`
    D
    `53.7^(@)`

  • AN unpolarised beam of light is incident at the polarising angle on the surface of a transparent medium of refractive index 1.6. The angle of refraction in the medium is

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