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An object is placed 20cm in front of a b...

An object is placed `20cm` in front of a block of glass `10cm` thick having its farther side silvered. The image is formed `23.2cm` behind the silvered face. The refractive index of glass is

A

`1.41`

B

`1.46`

C

`200//132`

D

`1.61`

Text Solution

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The correct Answer is:
C
N//a
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Knowledge Check

  • A small object is placed 20 cm in front of a block of glass 10 cm thick and its farther side silvered. The image is formed 22 cm behind the silvered face. Find the refractive index of glass.

    A
    1.15
    B
    1.25
    C
    1.67
    D
    1.1

  • Onc face of a rectangular glass plate 6 cm thick is silcerd. An object held 8 cm in front of the first face, froms an image 12 cm behind the silvered face. The refractive index of the glass is

    A
    `0.4`
    B
    `0.8`
    C
    `1.2`
    D
    `1.6`

  • A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at

    A
    30 cm lef
    B
    infinity
    C
    1 cm to the right
    D
    18 cm to the left
    • RESONANCE-GEOMATRICAL OPTICS -Exercise-2
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