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
Correct Answer:

Verified
Correct Answer:
Verified
Q17: The objective lens of a telescope has
Q18: The objective lens of a refracting astronomical
Q19: A magnifying glass uses a converging lens
Q20: Farsightedness can usually be corrected with<br>A)converging lenses.<br>B)diverging
Q21: The length of a telescope is 2.00
Q23: The focal length of the objective lens
Q24: Spherical lenses suffer from<br>A)both spherical and chromatic
Q25: A student constructs an astronomical telescope and
Q26: The length of a telescope is 1.60
Q27: A magnifying glass has a focal length