Find the Radius of a Star Image Formed on the Retina

question 9

Multiple Choice

Find the radius of a star image formed on the retina of the eye if the aperture diameter (the pupil) at night is 0.70 cm and the length of the eye is 3.0 cm.Assume the wavelength of starlight in the eye is 600 nm.(1 nm = 10−⁹ m)

• A) 5.2 × 10−⁴ m
• B) 3.1 × 10−⁶ m
• C) 2.6 × 10−⁶ m
• D) 2.6 × 10−⁴ m

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Definitions:

Independent Variable

Variables in a study that are presumed to influence or determine the dependent variable, essentially the cause in a cause-and-effect relationship.

Least Squares Estimate

A method of estimating the parameters of a linear regression line by minimizing the sum of the squares of the differences between the observed and predicted values.

Y-intercept

The point where a line crosses the Y-axis of a graph, indicating the value of the dependent variable when the independent variable is zero.

Independent Variable

A variable in an experiment or study that is manipulated to observe its effect on a dependent variable.