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 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: Correct Answer 1 and 3

The correct answer is option 1 i.e 1 and 3

Explanation:

Optical Microscope:

• It is also referred to as a light microscope that uses visible light and a system of lenses to generate magnified images of small objects.
• There are two types of Optical Microscopes:
  • Simple Microscope: Uses the optical power of a single lens or group of lenses for magnification
  • Compound Microscope: Uses a system of lenses (one set enlarging the image produced by another) to achieve a much higher magnification of an object
• In an optical microscope, both eyepiece and objective lenses are convex in nature.
• The magnification of the microscope depends on the length of the tube, not on the focal length.
• Hence only 1 & 3 is correct.