Write the formula for a lens connecting image distance (υ), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
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Formula for a lens connecting image distance (v), object distance (u) and the focal length (f) is,$\frac{1}{\text{v}}-\frac{1}{\text{u}}=\frac{1}{\text{f}}$
This is the lens formula. The lens formula has a minus sign (-) between $\frac{1}{\text{v}}$ and $\frac{1}{\text{u}}$ wheres the mirror formula has a plus sign (+) between $\frac{1}{\text{v}}$ and $\frac{1}{\text{u}}$ $\frac{1}{\text{v}}+\frac{1}{\text{u}}=\frac{1}{\text{f}}$
This is the lens formula. The lens formula has a minus sign (-) between $\frac{1}{\text{v}}$ and $\frac{1}{\text{u}}$ wheres the mirror formula has a plus sign (+) between $\frac{1}{\text{v}}$ and $\frac{1}{\text{u}}$ $\frac{1}{\text{v}}+\frac{1}{\text{u}}=\frac{1}{\text{f}}$
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