The focal length of the objective of a microscope is-

Consider the following statements about a microscope and a telescope 1. Both the eyepiece and the objective of a microscope are convex lenses. 2. The focal length of the objective of a telescope is lerger than the focal length of its eyepiece. 3. The magnification of a telescope increases with the increases in focal length of its objective. 4. The magnification of a microscope increases with the increases in focal length of its objective. Which of the statements given above are correct?

The focal length of object glass of a microscope is 0.02 m, that of the eye-piece is 0.04 and distance between them is 0.20 m. What is the distance of the object from the object glass when the image seen by the eye is 0.25 m from the eye-piece? Calculate also the magnifying power of the microscope.

The focal length of the objective of a compound microscope is f_0 and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument.,

The focal length of the objective of a compound microscope is f_0 and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument.,

The focal length of the objective of a compound microscope is f_0 and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument.,