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General Knowledge :: Physics

  1. Which of the following is optical illusion?

  2. A.

     Rainbow

    B.

     Earthshine

    C.

     Halo

    D.

     Mirage


  3. One can distinguish a telescope from a microscope by observing

  4. A.

     Length

    B.

     Colour

    C.

     Size of the lens

    D.

     Length and size of the lens


  5. Electron microscope works on which of the following principles?

  6. A.

     Optical interference

    B.

     Wave Nature of electrons

    C.

     Motion of charged particle in electromagnetic fields

    D.

     Faraday's law of Electromagnetic induction


  7. Holography is a technique of

  8. A.

     Recording a permanent, sharp two diimensional black and white or multicolour photograph

    B.

     Recording a permanent three dimensional multicolour photograph

    C.

     Recording a permanent three dimensional black and white photograph

    D.

     Recording a permanent three dimensional photograph of a given single colour or a multicolour


  9. Optical fiber works on the principle of

  10. A.

     Scattering

    B.

     Interference

    C.

     Total internal reflection

    D.

     Refraction


  11. Which one of the following is the correct sequence of passage of light in a compound microscope?

  12. A.

     Condenser -Objective lens -Eye -piece -Body tube

    B.

     Objective lens -Condenser -Body tube -Eye piece

    C.

     Condenser -Objective lens -Body tube -Eyepiece

    D.

     Eyepiece -Objective lens -Body tube -Mirror


  13. In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is

  14. A.

     Decreased by 2%

    B.

     Decreased by 4%

    C.

     Increased by 2%

    D.

     Increased by 4%


  15. A simple microscope consists of :

  16. A.

     A short focus convex lens

    B.

     A long focus convex lens

    C.

     A short focus concave lens

    D.

     A long focus concave lens


  17. Person who is colourblind cannot distinguish between

  18. A.

     Black and yellow

    B.

     Red and green

    C.

     Yellow and white

    D.

     Green and blue


  19. Fiber optics cable used in communication, works on the principle of

  20. A.

     Regular reflection of light

    B.

     Diffuse reflection of light

    C.

     Refraction of light

    D.

     Total internal reflection of light