Parfocal is the term used to describe a microscope that maintains focus when the objective lenses are replaced.
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What is the name of the objective lens ?</h3>
For observing minute features within a specimen sample, a high-powered objective lens, often known as a "high dry" lens, is perfect. You can see a very detailed image of the specimen on your slide thanks to the 400x total magnification that a high-power objective lens and a 10x eyepiece provide.
The four objective lenses on your microscope are for scanning (4x), low (10x), high (40x), and oil immersion (100x).
The first-stage lens used to create a picture from electrons leaving the specimen is referred to as the "objective lens." The objective lens is the most crucial component of the imaging system since the quality of the images is determined by how well it performs (resolution, contrast, etc.,).
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The same as the voltage in all bulbs. The series circuit is a pattern of the circuits in which the loads will have the same amount of power and consumed voltage. If one load goes out, the others will turn off also. This is because they have connected wires and pattern.
Electricity is a compound
Answer:
2.56 parsec
Explanation:
Parallax angle is the angle subtended by Earth over a gap of 6 months in its orbital path around the Sun with respect to a star. It can be used to measure the distance to the star.

Given: p = 0.39"
Substitute the value:
parsec