A 10-Inch Telescope (25

question 11

Multiple Choice

A 10-inch telescope (25.4 cm in diameter) is used to determine if what appears to be one star is actually two stars.Stars are so far away that they are essentially point sources.How close (in angle) can the two stars be and still be resolved by this telescope if it is focusing light of wavelength of 550 nm? (Consider only the limitation due to diffraction.)

• A) 4.2 × 10^-8 degree
• B) 2.6 × 10^-6 degree
• C) 3.0 × 10^-4 degree
• D) 1.5 × 10^-4 degree
• E) 6.6 × 10^-8 degree

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Definitions:

Seed-tree Cutting

A forestry technique that involves leaving a few seed-producing trees standing to regenerate the forest.

Harvested

The process of gathering mature crops from the fields or collecting the elements of a natural resource for human use.

Regenerate

To renew or restore a depleted or damaged system, such as a forest or urban area, often used in the context of ecological sustainability.

Clear-cutting

A logging practice involving the removal of all trees in a designated area, often resulting in significant ecological impacts.