20. The ability to visualize a specimen through a light microscope is NOT improv
ID: 146702 • Letter: 2
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20. The ability to visualize a specimen through a light microscope is NOT improved by (A) decreasing the numerical aperture (B) the use of immersion oil (C) staining the specimen to improve (D)using shorter wavelengths of contrast light (E) using lens with wider angle of aperture 21. In fluorescence microscopy, the incident light that is absorbed by the specimen has energy and wavelength compared to the fluorescence emission (A) lower, longer B) lower, shorter (C) higher, longer (D)higher, shorter (E) higher, similar 22. In a compound microscope, light travels from the light source to the eye through the following order of lenses (A) condenser, objective, ocular (B) cular, condenser, objective ocular (D objective, ocular, condenser 23. Which of the following is an advantage of (C) objective, condenser, (E) ocular, objective, condenser electron microscopy? (A) iving specimens can be observed inexpensive and easy to use .(B) The microscope is Specimens can be observed at high All of the above (C) resolution. D No artifacts are produced (E)Explanation / Answer
20. Decreasing the numerical aperture will not improve ability of visualizing specimen. Increasing numerical aperture will increase resolving power.
21. Incident light has higher energy and lower wavelength compared to emitted light.
22. Order of light passage is ocular, objective and condenser.
23. All of the above are advantages of electron microscope.
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