An Astronomical Telescope Has an Objective Lens with Focal Length

question 28

Multiple Choice

An astronomical telescope has an objective lens with focal length f_o and has an eyepiece with focal length f_e.A second telescope has objective and eyepiece lenses with quadruple the focal length of the first telescope.Which telescope gives the greater magnification and by what factor?

• A)The first telescope gives 16 times the magnification of the second.
• B)The second telescope gives 16 times the magnification of the first.
• C)Both telescopes give the same magnification.
• D)The actual focal lengths must be known to answer this question.
• E)​The second telescope gives 4 times the magnification of the first.

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Definitions:

Similarity

The extent to which two things are alike or share common characteristics.

Contact

The act or state of physical touching or being in close proximity, or the initiation of communication between individuals.

Jigsaw Classroom

An educational approach designed to minimize racial conflict and increase positive educational outcomes by having students from different backgrounds work together to complete a task.

Superordinate Goal

A shared goal that can only be achieved through cooperation among individuals or groups often used to resolve conflicts.