Which of the following is FALSE?

The correct answer is option 4.

Key Points

• A ray of light passing through the optical center of a lens does not bend; it continues in the same direction.
• In convex lenses, rays passing through the optical center are not refracted and thus do not emerge parallel to the principal axis.
• Convex lenses converge light rays that are parallel to the principal axis to a focal point.
• Option 4 incorrectly states that a ray of light passing through the optical center of a convex lens will emerge parallel to the principal axis, which is false.

Additional Information

• Simple Microscope
  • A simple microscope, also known as a magnifying glass, consists of a single convex lens.
  • It is used to magnify small objects for better visibility.
• Refractive Index
  • The refractive index of a medium is a measure of how much the speed of light is reduced inside the medium compared to a vacuum.
  • It is a constant property for a given medium under specific conditions.
• Magnification by a Lens
  • Magnification produced by a lens is the ratio of the image height to the object height.
  • It depends on the object distance (u) and the image distance (v) from the lens.
• Optical Center
  • The optical center of a lens is a point on the principal axis where a light ray passes through without being refracted.
  • In convex lenses, rays passing through this point continue in the same direction.