write the difference between simple microscope and compound microscope.
class 9 explain.
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write the difference between points minimum 4 or 5 points.
Answers
Simple microscope:
A simple microscope is a single magnifying (convex) lens of small focal length which must produce an erect, magnified and virtual image of the object.
Hence the object must be placed within the focal length f (between the points F and P) on one side of the lens and viewed through the other side of it.
The nearest point where an eye can clearly see is called the near point and the farthest point up to which an eye can clearly see is called the far point.
For a healthy eye the distance of the near point is 25 cm, which is denoted as D and the far point should be at infinity.
Compound microscope:
The lens near the object is called as objective. It forms a real, inverted and magnified image of the object.
This serves as the object for the lens close to the eye called as eyepiece.
The eyepiece serves as a simple microscope that produces finally an enlarged and virtual image.
The first inverted image produced by the objective is to be adjusted within the focus of the eyepiece so that the final image is formed nearly at infinity or at the near point.
The final image is inverted with respect to the object.
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Explanation:
SIMPLE MICROSCOPE-
1.) the first simple microscope was invented by antony wan leeuwenhoek around 1670.
2.) a simple microscope is used in places where rigorous research is not required.
3.) we use a simple microscope at a fundamental level. It is equipped with one bi-convex lens with a short focal length. It can enlarge the objects placed on the focal length.
4.) objects can be viewed with a single lens.
COMPOUND MICROSCOPE-
1.) the first compound microscope was invented by hans and zacharias janssen, circa 1950.
2.) a compound microscope is used for professional purposes i.e. at places where extensive research is required.
3.) it is an instrument used to have a magnified views of small objects on a glass slide.
4.) compound means many and compound microscope means using multiple (3 to 5) lenses.