18. For the following objective lens, if the refractive index η is 1.51 and the half angle of the angular aperture μ is20: what is the numerical aperture of this objective lens? If the light with 400...
A microscope objective is used with a numerical aperture NA= 1.0 and immersion oil of refractive index n = 1.414. Assuming that the wavelength of light λ =0.486 µm, find the resolution of the microscope and its aperture angle α.
Light of wavelength 589 nm is used to view an object under a microscope. The objective lens of the microscope is the lens that gathers light from the object being observed and focuses the light rays in order to form an image of the object. It acts as the aperture of the system, determining its resolution. In this case, the objective lens is circular, of diameter 0.95 cm. Assuming that the resolution of the microscope depends solely on the diffractive...
(1 point) READING 4 The resolution of a microscope is diffraction limited, just as the eye, but gains a significant advantage because an object can be placed very close to its objective lens. The smallest resolvable linear separation xTor an ordinary light microscope is: where λ is he wavelength o light used, and Θ ls he half Viewing angle 0 he obiective The quantity n sne s ca e the num enca aperture of he obiective where n s the...
Objective lens Refracted (lost) light rays, VY Immersion oil Slide Condenser - ( Light source Figure 2 Refractive index in air and in mineral oil Carrera attachment Eyeplece focular lens) Light pathway LU Arm Body tube Objective Coarse and fine focusing adjustment knob Stage Light source Spircimen Condenser Illuminator Figure 3 Pathway of light in a compound scope Microscopy/Microscopic Examination of Stained Cell Preparations Q8 Use Figure 2 and 3 in the lab info to answer the following question. Which...
1. Fill out the following table by indicating which general technique (light microscopy (LM) or electron microscopy (EM]) could be used to observe each structure or phenomenon. Put "no" in the box if the technique could not be used. If light microscopy can be used, name one technique (bright-field, phase-contrast, fluorescence, etc.) that you think would be effective. You will find some useful information in Appendix 1 of this manual and Chapter 18 of your textbook. Structure or phenomenon Could...
100. Flare is: (a) the widest frequency of light that can enter an objective (b) the bending of light as it passes through different substances (c) wavelength/2NA (d) when the beam of light "spreads" wider than the objective's "hole" (e) wavelengths of light too short to enter the objective 101. Coccobacillus shaped bacteria are considered to be_?_ (a) cocci (b) bacilli (c) diplobacilli (d) diplococci (e)answers a and b only 102. This microscope is used for cheap and quick "'diagnosis"...