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Why the focal length of the objective is less than that of eyepiece of a microscope?

Why the focal length of the objective is less than that of eyepiece of a microscope? Correct Answer To get maximum magnification

CONCEPT:

  • Microscope: The instrument having double convex lens with short focal length which produces an enlarged image of a small object is called as microscope.
  • The microscope has two convex lenses- one of them is called as objective lens and other one is known as eyepiece.

 

EXPLANATION:

  • Since the magnification of a compound microscope is inversely proportional to the focal length of objective lens.
  • So to get the maximum magnification the focal length of the objective lens must be less than the focal length of eyepiece. So option 2 is correct.

Related Questions

Consider the following statements   1. The focal length of the eyepiece is larger than the focal length of the objective. 2. The focal length of the eyepiece is smaller than the focal length of the objective. 3. The aperture of the eyepiece lens is larger than the objective lens. Which of the following statements is/are INCORRECT about a compound microscope?
In case of a compound microscope, which of the following statements is/are correct?
1. The focal length of the eyepiece is larger than the focal length of the objective.
2. The focal length of the eyepiece is smaller than the focal length of the objective.
3. The image produced in a normal optical microscope is real.
4. The image produced in a normal optical microscope is virtual.
Select the correct answer:
Which of the following statements about optical microscope is/are correct? 1. Both the eyepiece and objective of a microscope are convex lenses. 2. The magnification of a microscope increases with increase in focal length of the objective. 3.The magnification of a microscope depends upon the length of the microscope tube. 4. The eyepiece of a microscope is a concave lens. Select the correct answer using the code given below:
Which of the following statements about optical microscope is/are correct?
1. Both the eyepiece and objective of a microscope are convex lenses.
2. The magnification of a microscope increases with increases in focal length of the objective.
3. The magnification of a microscope depends upon the length of the microscope tube.
4. The eyepiece of a microscope is a concave lens.
Select the correct answer:
Which statement is correct about telescope: a) The focal length of the objective lens is more than the eyepiece. b) The focal length of the eyepiece is more than the objective lens. c) The aperture of the objective lens is more than the eyepiece. d) The aperture of the eyepiece is more than the objective lens.
In case of compound microscope which of the following statements is/are correct? 1) The focal length of eye piece is larger than the focal length of the objective 2) The focal length of the eye piece is smaller than the focal length of the objective 3) The image produced in a normal optical microscope is real 4) The image produced in a normal optical microscope is virtual
A microscope of objective focal length 1 cm and an eyepiece of focal length 2.0 cm has a tube length of 20 cm. What will be the magnification of the microscope?
The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for
From the given table, what is the percentage of students scoring 40 or more, but less than 70. Scores Less than 20 Less than 30 Less than 40 Less than 50 Less than 60 Less than 70 Less than 80 No. of Students 12 19 22 31 38 46 50
The focal length of the objective lens of a telescope is 50 cm. If the magnification of the telescope is 25, then the focal length of the eyepiece is