Basic of Microscope Part 1
Quiz
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Biology
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University
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Practice Problem
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Easy
Sachu N
Used 3+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
Answer explanation
Compound microscope contains three separate lens systems. The condenser lens is placed between the light source and the specimen and it gathers and focuses the light rays in the plane of the microscopic field to view the specimen.
2.
DRAG AND DROP QUESTION
1 min • 1 pt
What is the minimum distance for the eye to focus any object is (a)
Answer explanation
The eye cannot focus on objects brought closer to it less than 25 cm; this is, accordingly the distance of maximal effective magnification. An object must also subtend an angle at the eye of 1 degree or greater.
3.
MATCH QUESTION
1 min • 1 pt
Moves the stage slightly to SHARPEN the image
Moves the stage up and down for FOCUSING
Total magnification
regulates the amount of light that reaches the specimen
4.
DROPDOWN QUESTION
1 min • 1 pt
Which part of the light microscope controls the intensity of light entering the viewing area? (a)
Answer explanation
On the condenser is mounted a shutter like an apparatus called the diaphragm which opens and closes to permit more or less light into the viewing area. Condenser lens just helps in condensing the light rays. Coarse and fine adjustment screws are used for focusing under different power lens.
5.
LABELLING QUESTION
1 min • 1 pt
Label the parts 1,2,8,9, of the Microscope
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