Question

in compound microscope what is the name of the lense near the object a) objective
b) eyepiece c) concave d) None of these​

Answer 1

In compound microscope,the objective lens is used near the object. (Option A)

• There are basically two types of lens in a compound microscope. The lens which is situated near the specimen object is known as the objective lens and the lens which is situated in the other end is known as the eyepiece.

• Between these two lenses,the objective lens do the most important job ,during the whole magnification process of the microscope.

• The objective lens gathers all the coming light rays from the specimen object and transmits to the eyepiece in order to obtain the magnification.

Answer 2

In compound microscope, a) Objective is the name of the lens near the object.  

Explanation:

• Historians attribute the invention of the compound microscope to the Dutch eyewear manufacturer Zacharias Janssen around 1590.
• The compound microscope uses light and lenses to enlarge the image and is also called light or optical microscope (compared to an electronic microscope).
• The simplest light microscope is the magnifying glass and is suitable for a magnification of around ten times (10x).
• The compound microscope has two lens systems for higher magnification:
• 1) The eyepiece or the eyepiece lens you are looking into, which has a lower magnification, larger focal length; and which further enlarges the image and projects it onto the retina of the eye.
• 2) The objective lens, It has a very short focal length and will be placed close to the object. Before buying or using a microscope, it is important to understand the functions of each part.  

From the explanation, it is clear that a) Objective lens is correct.

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