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General Knowledge :: Physics

  1. Lens is made up of which glass

  2. A.

     Ordinary glass

    B.

     Pyrex glass

    C.

     Flint glass

    D.

     Cobalt glass


  3. The final image in a simple microscope is

  4. A.

     Real, diminished and inverted

    B.

     Real, magnified and erect

    C.

     Virtual, magnified and erect

    D.

     Virtual, diminished and erect


  5. Which microscope is often used to view metal surfaces?

  6. A.

     Optical microscopes

    B.

     Scanning tunneling microscopes

    C.

     Electron microscopes

    D.

     None of the above


  7. Which of the following cannot be used for making lenses?

  8. A.

     Plastic

    B.

     Soil

    C.

     Glass

    D.

     Water


  9. The illuminating powers of two sources are compared by

  10. A.

     A spectrometer

    B.

     A photometer

    C.

     A polarimeter

    D.

     A fluxmeter


  11. Rainbow is seen after rain because of hanging molecules of water which act as

  12. A.

     Lenses

    B.

     Mirrors

    C.

     Prisms

    D.

     Slabs


  13. The information of brilliant colors in a thin soap film is a consequence of the phenomena of

  14. A.

     Polarization and interference

    B.

     Diffraction and dispersion

    C.

     Multiple refraction and dispersion

    D.

     Multiple reflection and interference


  15. Optic fibres are used in :

  16. A.

     CAT scans

    B.

     X-ray photos

    C.

     Ultrasound scans

    D.

     Endoscopy


  17. Purpose of an optical filter is to

  18. A.

     Reflect lights of different colours

    B.

     Dispense light into component colours

    C.

     Refract light of different colours

    D.

     Transmit or absorb light of different colours


  19. Parabolic mirrors are used in

  20. A.

     Car headlights

    B.

     Driving mirrors

    C.

     Dentists mirros

    D.

     Shaving mirros