The Angular Magnification of a Refracting Telescope Is 40 X

question 15

Multiple Choice

The angular magnification of a refracting telescope is 40 x.When the object and final image are both at infinity,the distance between the eyepiece and the objective is 143.5 cm.The telescope is used to view a distant radio tower.The real image of the tower,formed by the objective,is 6.0 mm in height.The focal point of the eyepiece is positioned at the real image.What is the angle subtended by the final image of the tower.

• A) 0.15 rad
• B) 0.17 rad
• C) 0.19 rad
• D) 0.21 rad
• E) 0.23 rad

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Definitions:

Long Run

A period of time in economics wherein all inputs and factors of production can be varied, with no fixed factors.

Variable Inputs

Resources or factors of production that can be adjusted in the short run to meet changes in demand.

Diminishing Returns

An economic concept indicating that as more investment is made in a particular area, the rate of profit from that investment, after a certain point, starts to decline.

Marginal Product

The additional output produced by using one more unit of a particular input, while holding other inputs constant.