An Astronomical Refracting Telescope Is Made from Two Lenses

question 72

Multiple Choice

An astronomical refracting telescope is made from two lenses.The objective lens has a focal length of
And the eyepiece lens has a focal length of
(a) What is the total length of the telescope?
(b) What is the angular magnification of the telescope?
(c) What is the magnification by turning the telescope around and looking through the objective lens first?

• A)(a)131 cm (b)6.71 (c)0.15
• B)(a)97 cm (b)0.15 (c)6.71
• C)(a)262 cm (b)0.87 (c)1.15
• D)(a)194 cm (b)1.18 (c)0.85

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Definitions:

Portfolio Weights

The percentage composition of a particular holding relative to the total investment portfolio.

Risk-To-Reward Ratio

A benchmark used by investors to gauge the prospective returns of an investment in comparison to the risk associated with securing those returns.

Efficient Market

A type of market where all relevant information is rapidly and correctly reflected in securities prices, allowing them to be bought and sold at their fair value.

Systematic Risk

Market or sector-wide risk, commonly called market risk, that remains despite attempts at diversification.