A Lens with a Positive Focal Length F₂ = +40

question 53

Multiple Choice

A lens with a positive focal length f₂ = +40 cm is placed 20 cm behind a lens with a negative focal length f₁ = -80 cm. An object is placed 240 cm in front of the lens f₁. The final image distance relative to lens f₂ is

• A) -40 cm.
• B) 56 cm.
• C) -56 cm.
• D) 80 cm.
• E) -80 cm.

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Definitions:

Manufacturing Overhead Control

This involves managing and recording all indirect production costs associated with manufacturing operations, including utilities, maintenance, and equipment depreciation.

Backflush Accounting

A simplification of the accounting system by eliminating the accumulation and transfer of product costs by departments (intermediate departmental work in process accounts), but instead pulls the material and conversion costs directly to finished goods.

Work in Process Inventories

Items in various stages of production but not yet completed, representing a component of a manufacturer's inventory.

Lean Practices

A systematic method for waste minimization within a manufacturing system without sacrificing productivity, focusing on adding value and reducing work that is not of value.