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A surveyor on one bank of canal observed...

A surveyor on one bank of canal observed the image of the 4 inch and 17 ft marks on a vertical staff,which is partially immersed in the water and held against the bank directly opposite to him, coincides If the `17 ft` mark and the surveyor's eye are both `6 ft` above the water level ,estimate the width of the canal ,assuming that the reflective index of the water is `4//3` .Zero mark is at the bottom of the canal.

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16 Feet
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A surveryor on one bank of canal observed the image of the 4inch and 17ft marks on a vertical staff,which is partially immersed in the water and held against the bank directly opposite to him, coincides If the 17ft mark and the suveryor's eye are both 6ft above the water level ,estimate the width of the canal ,assuming that the reflective index of the water is 4//3 .Zero mark is at the bottom of the canal.

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Knowledge Check

  • In a pond of water, a flame is held 2 m above the surface of the water. A fish is at depth of 4 m from the water surface. Refractive index of water is (4)/(3) . The apparent height of the flame from the eyes of fish is -

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    B
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    D
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