An Astronomical Telescope Is Made with Lenses of Focal Lengths

question 31

Multiple Choice

An astronomical telescope is made with lenses of focal lengths 80.0 and 2.00 cm.What is the barrel length on this telescope?

• A) 80.0 cm
• B) 82.0 cm
• C) 78.0 cm
• D) 105 cm
• E) 127 cm

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Definitions:

Otosclerosis

A disorder of the middle ear that causes hearing loss due to abnormal bone growth around the stapes bone, which can immobilize it and prevent sound from entering the inner ear.

Pruritus

The medical term for itching, a symptom that can result from various conditions and cause a desire to scratch.

Jaeger Chart

A chart used in eye examinations consisting of texts of various sizes to test near vision acuity.

Hyperopia

A vision condition also known as farsightedness, where distant objects are seen more clearly than close ones.