A Cassegrain Telescope Has a Primary Mirror with a 5-M

question 165

Multiple Choice

A Cassegrain telescope has a primary mirror with a 5-m diameter and a hole with a diameter of 5 cm through the primary mirror.By what percentage is the light-gathering power of the mirror reduced because of the hole?

• A) 0.01%
• B) 1%
• C) 20%
• D) 50%

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Definitions:

Portfolio Management

The art and science of making decisions regarding investment mix and policy, matching investments to objectives, and balancing risk against performance.

Portfolio Management Process

The structured approach of managing investments including planning, implementation, and monitoring to achieve specific financial objectives.

Investment Management Process

The series of steps and decisions involved in managing an individual's or institution's investments, from setting objectives to selecting assets and monitoring performance.

Prudent Investor Rule

The prudent investor rule is a legal guideline advising trustees to manage others' funds by diversifying investments and taking a reasonable level of risk, as a prudent investor would.