A Camera Is Used to Photograph the Full Moon,which Has

question 55

Multiple Choice

A camera is used to photograph the full moon,which has an angular diameter of 0.53°.The image on the film is 2.3 mm in diameter.What is the focal length of the lens?

• A)2.3 mm
• B)500 mm
• C)250 mm
• D)790 mm
• E)​25.5 mm

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Definitions:

Mount St. Helens

Mount St. Helens is an active stratovolcano located in the Cascade Range of the Pacific Northwest, famous for its catastrophic eruption on May 18, 1980.

Magma

Liquid rock found under the Earth's surface that can harden and transform into igneous rocks.

Viscous Lava

Lava that has a thick, sticky consistency due to its high silica content, which causes it to flow slowly.

Scoria

A type of volcanic rock characterized by its vesicular texture and low density, formed from cooling lava.