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Author Question: What is the purpose of the blue filter when using a tungsten-halogen microscope light? a. ... (Read 146 times)

KimWrice

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on: Jun 25, 2018
What is the purpose of the blue filter when using a tungsten-halogen microscope light?
 
  a. Eliminate blue color
  b. Eliminate yellow color
  c. Reduce light intensity
  d. Filter out stray light

Question 2

Which of the following would be least likely to cause a fuzzy image on oil power?
 
  a. Using a plan-achromatic objective lens
  b. Objective not screwed in tightly
  c. Not enough oil on the slide when using oil immersion lens
  d. Focus controls not adjusted


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voltaire123

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
A blue or daylight filter is used to eliminate the yellow color emitted by tungsten-halogen light bulbs.

Answer to Question 2

ANS: A
When an objective is not screwed in tightly, not enough oil has been used on a slide when using an oil immersion lens, or the focus controls are not adjusted, an image is likely to be fuzzy or unclear, making it difficult to visualize objects. Using a plan-achromatic lens gives a flat field so that the edges of the field are in focus at the same time as the center.


KimWrice

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Reply 2 on: Jun 25, 2018
YES! Correct, THANKS for helping me on my review

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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