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A dip circle is at right angles to t...

A dip circle is at right angles to the magnetic meridian. What will be the apparent dip ?

Text Solution

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In case of magnifying lens, the lens is convergent and the image is erect, virtual and enlarged and between infinity and the object on the same side of the lens as shown in the above diagram.
So, here
f = + 10 cm, v = -30 cm
Let ‘ x ’ be the object distance
Using lens formula
`1/f = 1/v-1/u` we have, `1/(-30) - 1/(-x) =1/10`
`implies x=7.5cm`
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