What is the purpose of the blue filter when using a ...

[KimWrice]

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

[voltaire123]

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]

Thanks for the timely response, appreciate it

[strudel15]

Wow, this really help