The Objective and the Eyepiece of a Refracting Astronomical Telescope

question 13

Multiple Choice

The objective and the eyepiece of a refracting astronomical telescope have focal lengths of 320 cm and 4.0 cm,respectively.The telescope is used to view Neptune and the final image is set at infinity.The diameter of Neptune is 4.96 × 10⁷ m,and its distance from Earth at the time of observation is 4.4 × 10¹² m.What is the angle (in milliradians) subtended by the final telescopic image of Neptune?

• A)0.90 mrad
• B)1.1 mrad
• C)1.3 mrad
• D)1.5 mrad
• E)1.7 mrad

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Definitions:

Mean Salary

The average amount of money earned by employees in a particular job or industry, calculated by summing all salaries and dividing by the number of employees.

Chi-Squared Distribution

A probability distribution that is widely used in inferential statistics for hypothesis testing and estimating variances.

Left-Tailed Area

The part of a distribution graph that appears to the left of a specified value, often related to hypothesis testing in statistics.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or a parameter estimation process.