The Focal Length F of a Lens Is Given by the Formula

question 70

Essay

The focal length f of a lens is given by the formula $$\frac { 1 } { f } = \frac { 4 } { d 1 } + \frac { 3 } { d 2 }$$ where d1 is the distance from the object to the lens and d2 is the distance from the lens to the image. Solve the formula for f .

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Definitions:

Marginal-Cost Curve

A graph that displays the cost of producing one additional unit of a good or service.

Average-Total-Cost Curve

A graph that displays the mean total cost of manufacturing across various output quantities, generally characterized by a U-shape because of the effects of economies and diseconomies of scale.

Long-Run Time Period

A duration in economics where all factors of production and costs are variable, allowing for complete adjustment.

Economies Of Scale

The economical benefits that businesses gain from their operation size, typically resulting in lower costs per unit of output as the scale expands.