The Focal Length of a Magnifying Glass Is 15 Cm $1.7$

question 129

Multiple Choice

The focal length of a magnifying glass is 15 cm. If the near point of a person is 25 cm, what is the angular magnification of the glass for this person when his eyes are focused at infinity?

• A) \(1.7\)
• B) \(2.7\)
• C) \(3.7\)
• D) \(5.7\)
• E) \(4.7\)

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Definitions:

Graph

A diagram showing the relation between variable quantities, typically of two variables, each measured along one of a pair of axes at right angles.

Logarithm

The exponent or power to which a base, typically 10 or e, must be raised to produce a given number; it is the inverse operation of exponentiation.

Graph

A visual diagram that exhibits the arrangement of connections or interrelations among several objects with the help of unique symbols including dots, lines, and bars.

Logarithmic Form

A way of writing exponential equations where the exponent is isolated on one side of the equation.