Two Thin Lenses (Focal Lengths F₁ and F₂)are in Contact

question 17

Multiple Choice

Two thin lenses (focal lengths f₁ and f₂) are in contact.Their equivalent focal length is:

• A)f₁ + f₂
• B)f₁f₂/(f₁ + f₂)
• C)1/f₁ + 1/f₂
• D)f₁ - f₂
• E)f₁(f₁ - f₂)/f₂

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Definitions:

Consolidated Income Statement

A Consolidated Income Statement is a financial report that combines the income, expenses, and profits of a parent company and its subsidiaries, showing the overall performance as a single entity.

Acquisition Method

The Acquisition Method is an accounting technique used in consolidating the financial statements of a group where one entity controls others.

Noncontrolling Interest

The share of ownership in a subsidiary that cannot be directly or indirectly linked to the parent company.

Fair Value

The revenue expected from an asset sale or the cost to offload a liability in a transaction with market players on the date it is appraised.