INTRODUCTION
MICROSCOPE PARTS MAGNIFICATION RESOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To focus the lens on an objective
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The ability to see more than one object clearly
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The ability to stay in focus when switching from one objective to another
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The reflection of light between the two mirrors
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Detailed explanation-1: -Parfocal means that when one objective lens is in focus, then the other objectives will also be in focus.
Detailed explanation-2: -"Parfocal” refers to objectives that can be changed with minimal or no refocusing. When you adjust your microscope from one magnification to another, it is nice when the lenses remain in focus the entire time. This is possible when a microscope has parfocalled objectives.
Detailed explanation-3: -par·fo·cal (ˈ)pär-ˈfō-kəl. : having corresponding focal points all in the same plane : having sets of objectives or eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope) with which they are used.
Detailed explanation-4: -A parfocal lens system is a lens that maintains its focus despite changes in the lenses focal length or magnification. This enables cinematographers to zoom in and out from a subject while maintaining the same focus.
Detailed explanation-5: -Parfocal microscope objectives stay in focus when magnification is changed; i.e., if the microscope is switched from a lower power objective (e.g., 10×) to a higher power objective (e.g., 40×), the object stays in focus. Most modern bright-field microscopes are parfocal.