E-PolyLearning

21. Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed?
a. Eyepiece lens
b. Objective lens
c. Condenser lens
d. Magnifying lens
View Answer Report Discuss 50-50!
Answer: (c).Condenser lens

22. What is the minimum distance for the eye to focus any object?
a. 11 cm
b. 25 cm
c. 32 cm
d. 4 2 cm
View Answer Report Discuss 50-50!
Answer: (b).25 cm

23. Resolving power of a microscope is a function of____________
a. Wavelength of light used
b. Numerical aperture of lens system
c. Refractive index
d. Wavelength of light used and numerical aperture of lens system
View Answer Report Discuss 50-50!
Answer: (d).Wavelength of light used and numerical aperture of lens system

24. The greatest resolution in light microscopy can be obtained with ___________
a. Longest wavelength of visible light used
b. An objective with minimum numerical aperture
c. Shortest wavelength of visible light used
d. Shortest wavelength of visible light used and an objective with the maximum numerical aperture
View Answer Report Discuss 50-50!
Answer: (d).Shortest wavelength of visible light used and an objective with the maximum numerical aperture

25. Oil immersion objective lens has an NA value of____________
a. 0.65
b. 0.85
c. 1.33
d. 1.00
View Answer Report Discuss 50-50!
Answer: (c).1.33

Page 5 of 50