1.

An object O is placed at the bottom of a container in which water is filled up to a height of 8m. Refractive index of water is 4//3. OAB is a vertical line. Observer is looking at O from point E as shown in figure. For the observer, position of O will appear to be

Answer»

SOMEWHERE on line OAB
To the left of line OAB
At a depth 6m below water surface
At a depth LESS than 6 m below the water surface

Solution :If observer looks from point B then apparent depth would be `(8)/(4//3)=6m`. But for the observer at E image will be shifted further away from E in horizontal DIRECTION and HENCE will be on the left side of line OAB. Image will also be shifted a little upward to MAKE apparent depth less than 6m. Hence, options (b) and (d) are correct.


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