A Microscope Has an Objective Lens of Focal Length 1

question 22

Multiple Choice

A microscope has an objective lens of focal length 1.40 mm and an eyepiece of focal length 20.00 mm.It is adjusted for minimum eyestrain for persons with a near point of 25.0 cm.A blood sample is placed 1.50 mm from the objective.How far apart are the lenses?

• A)20 mm
• B)21 mm
• C)23 mm
• D)41 mm

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Definitions:

Bird Populations

The number of individual birds within a specific species, locality, or habitat.

Passenger Pigeon

A species of bird that was once abundant in North America but became extinct in the early 20th century due to overhunting and habitat destruction.

Extinct

A term describing a species that no longer exists anywhere on Earth.