The distance between the optical centre of a convex lens and its principal focus is called its_______?

Related Mcqs:

1. A convex mirror always ___________ ?

   A. Forms a real image
   B. Forms a virtual image 
   C. Forms an inverted image
   D. Produces a larger image

   Submitted by: Rashid Mehmood

2. Sagittarius-A, the Blackhole at the centre of the Milky Way Galaxy is at a distance of_________?

   A. 25500 Lightyears
   B. 24500 Lightyears
   C. 23640 Lightyears
   D. 25640 Lightyears 

   Submitted by: Aslan

3. An optical instrument which is used measure the properties of visible light is called?

   A. Microscope
   B. Telescope
   C. Spectroscope
   D. Oscilloscope

   Submitted by: Hussain Ahmed

4. A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?

   A. Glaucoma
   B. Hemophilia
   C. Cataract
   D. Diphtheria

   Submitted by: Aamir Hussain Laghari

5. The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________?

   A. Aphelion
   B. Perihelion
   C. Perigee
   D. Apogee
   E. None of these

6. Myopia is a defect of Human eye. it can be corrected by using a lens called?

   A. Convex lens
   B. Concave lens
   C. Cylindrical lens
   D. Plano convex lens
   E. None of these

7. In what year did Galileo first use an optical telescope to study the moon?

   A. 1492
   B. 1609
   C. 1212
   D. 1743

   Submitted by: Malik Asghar Hussain

8. Long-sight defect could be corrected by using __________ lens?

   A. concave
   B. Convex
   C. diverging
   D. none of these

9. Short-sight defect could be corrected by a _____________ lens?

   A. concave lens
   B. convex lens
   C. converging lens
   D. none of these

   ALSO CHECK: Long-sight defect could be corrected by using __________ lens?

   Submitted by: Areesha Khan

10. Which among the following lens is used to correct Presbyopia?

    A. Bifocal
    B. Convex
    C. Concave
    D. Cylindrical

    Submitted by: IHSAN MallaH