Question

Light compound microscope with 15X eyepiece lens and 45X objective lens will have a magnification of
A) 2000
B) 675
C) 1000
D) 45

Answer 1

It is also known as an optical microscope is a type of microscope that uses a system of lenses and visible light in order to generate magnified images of the same object. Their basic structure is very simple; however, some complex designs are also used for better resolution and sample contrast.

Complete answer:

When viewing an image through an optical or light compound microscope, in order to ascertain the total magnification, the power of the objective lens is to be noted and multiplied with that of the power of the eyepiece.
The power of the objective lens varies from 10X, 40X or even 4X. On the other hand, the power of the eyepiece is always constant at 10X generally.
Therefore, a Compound microscope with objective lens with power 40X and eyepiece with 10X power will have a magnification of 400X.
Now there are some changes in the power of eyepiece as well. For instance, sometimes the power of eyepiece is increased to include the minor details as well. Therefore, a compound microscope with 45X objective lens and eyepiece with 15X power will have a magnification of 675X.

Therefore, the correct answer is option ‘B’.

Note: There are two optical systems in this microscope, one is the eyepiece and the other is the objective lens. The eyepiece or ocular is situated at the top of the viewing glass. And the objective lens is the primary optical lens of the microscope.