Q. 444.5( 2 Votes )

A paperweight in the form of a hemisphere of radius 3.0 cm is used to hold down a printed page. An observer looks at the page vertically through the paperweight. At what height above the page will the printed letters near the center appear to the observer?

Answer :

44.PNG


Radius of the paper weight = R= 3.0 cm


Refractive index of paper weight =


Refractive index of air=


• Refraction at point A


Object distance = u= 0


Radius R


By lens equation





Therefore, image of the printed letters will be formed at the point.


• Refraction at point B


Object distance u=-3 cm


Radius R= -3 cm




By lens equation







Hence, there will be no shift in the final image.


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