A Concave Mirror Has a Focal Length of 20 Cm

question 23

Multiple Choice

A concave mirror has a focal length of 20 cm. What is the magnification if the object's distance is 100 cm?

• A) 1/2
• B) 1/4
• C) −2
• D) 4
• E) −1/4

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Definitions:

Monitor Tag

In programming and industrial control systems, a label or identifier assigned to a variable or process parameter that is subject to continuous observation or tracking.

Edit Tag

The action or process of modifying an identifier or name in a database, programming environment, or system setup.

XIC Instruction

The XIC (Examine if Closed) Instruction in PLC programming is used to check if a specific input or bit status is true (i.e., on or closed) before executing subsequent instructions.

Logic Input

An input signal or condition received by a device that is used to perform logical operations in control systems.