Question

An optical instrument used by mathematicians to study new patterns in geometry and by kids as a play toy is-
1. Kaleidoscope
2. Periscope
3. Pin-hole camera
4. A simple camera

Answer 1

Correct Answer - Option 1 : Kaleidoscope

The correct answer is option 1) i.e. Kaleidoscope.

CONCEPT:

• td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;} Kaleidoscope: A kaleidoscope is an optical instrument consisting of two or more reflecting surfaces.
  • These surfaces are tilted towards each other at a certain angle to obtain symmetrical patterns when viewed from the other end.
  • The tube with reflecting surfaces consists of colored pieces of glass. By rotating the tube, symmetrical images are created.

EXPLANATION:

• A kaleidoscope is used to form symmetrical patterns by exploiting the concept of multiple reflections.
• It is used by mathematicians to study the new geometrical patterns formed by tilting the kaleidoscope.
• It is also used by kids as a playing toy.

• Periscope: td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;} It is an optical instrument present in submarines generally to view objects that are above the level of direct sight or present in a place where vision is obstructed. It consists of a tube with many prisms, lenses, and mirrors arranged in a specific manner.
• Pin-hole camera: It is a simple instrument that has a pin-sized hole through which an object is viewed. It is used by some people to study Sun's movement with time(Solargraphy) and to view eclipses.
• A simple camera is used to capture the image of an object on a screen.