Important Scientific Instruments and their usage Important Scientific Instruments and their usage


Important Scientific Instruments and their usageImportant Scientific Instruments and their usage



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  • Accumulator : It is used to store electrical energy
  • Altimeter : It measures altitudes and is used in aircraft.
  • Ammeter : It measures strength of electric current (in amperes).
  • Anemometer : It measures force and velocity of the wind.
  • Audiometer : It measures the intensity of sound.
  • Audiphones : It is used for improving the imperfect sense of hearing.
  • Barograph : It is used for continuous recording of atmospheric pressure.
  • Barometer : It measures atmospheric pressure.
  • Binocular : It is used to view distant objects
  • Bolometer : It measures heat radiation
  • Calorimeter : It measures the quantity of heat.
  • Carburettor : It is used in an internal combustion engine for charging the air with petrol vapor.
  • Cardiogram : It traces movements of the heart, recorded on a cardiograph.
  • Chronometer : It determines the longitude of a place kept the onboard ship.
  • Cinematography : It is an instrument used in cinema making to throw on screen and enlarged image of the photograph.
  • Colorimeter : An instrument for comparing intensities of color.
  • Commutator : An instrument to change or remove the direction of an electric current, in dynamo used to convert alternating current into direct current.
  • Cresco graph : It measures the growth in plants.
  • Cyclotron : A charged particle accelerator which can accelerate charged particles to high energies.
  • Dynamo : It converts mechanical energy into electrical energy
  • Dynamometer : It measures force, torque, and power
  • Electroscope : It detects the presence of an electric charge.
  • Endoscope : It examines internal parts of the body.
  • Eudiometer : A glass tube for measuring volume changes in chemical reactions between gases.
  • Fathometer : It measures the depth of the ocean.
  • Galvanometer : It measures the electric current of low magnitude.
  • Hydrometer : It measures the specific gravity of liquids.
  • Hydrophone : It measures sound under water.
  • Hygrometer : It measures humidity in the air.
  • Kymograph : It graphically records physiological movements (Blood pressure and heartbeat).
  • Lactometer : It determines the purity of milk.
  • Manometer : It measures the pressure of gases.
  • Mariner’s compass : It is an instrument used by the sailors to determine the direction.
  • Microphone : It converts the sound waves into electrical vibrations and to magnify the sound.
  • Microscope : It is used to obtain the magnified view of small objects.
  • Odometer : An instrument by which the distance covered by wheeled vehicles is measured.
  • Periscope : It is used to view objects above sea level (used in submarines)
  • Phonograph : An instrument for producing sound.
  • Photometer : The instrument compares the luminous intensity of the source of light
  • Potentiometer : It is used for comparing electromotive force of cells.
  • Pyrometer : It measures very high temperature.
  • Quartz Clock : A highly accurate clock used in astronomical observations and other precision work
  • Radar : Radio, angle, detection, and range is used to detect the direction and range of an approaching airplane by means of radio microwaves
  • Radiometer : It measures the emission of radiant energy.
  • Rain Gauge : An apparatus for recording rainfall at a particular place.
  • Rectifier : An instrument used for the conversion of AC into DC.
  • Refractometer : It measures refractive index.
  • Saccharimeter : It measures the amount of sugar in the solution.
  • Salinometer : It determines the salinity of solution.
  • Seismograph : It measures the intensity of earthquake shocks.
  • Sextant : This is used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star.
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World Heritage Sites in India

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The UNESCO , a specialised agency of the United Nations, has a list of sites, such as forest, mountain, lake, desert, monument, across the world which UNESCO considers is in the interest of international community to preserve each sites. These are the places of natural or cultural heritage. India with its rich biodiversity and great wildlife heritage has these natural World Heritage Sites. As of 2018, India has 36 heritage sites, the sixth most of any country.

firstResponsiveAdvt Name of Heritage sites Year Place .
Ajanta Caves 1983 Maharashtra .
Ellora Caves 1983 Maharashtra .
Agra Fort 1983 Uttar Pradesh .
Taj Mahal 1983 Uttar Pradesh .
Sun Temple 1984 Orissa .
Mahabalipuram Monuments 1984 Tamil Nadu .
Kaziranga National Park 1985 Assam .
Keoladeo National Park 1985...

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National Highways in Kerala

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കേരളത്തിലെ ദേശീയപാതകൾ NH No. Route .
NH 66 Thalappady - Parassala .
NH 544 Valayar - Edappally .
NH 85 Bodimettu - Kundannoor .
NH 183 Kollam - Sasthamkota-Chengannur-Kottayam-Vandiperiyar-Kumily .
NH 183A Sasthamkota - Adoor - Pathanamthitta - Vandiperiyar .
NH 185 Adimali -Cheruthoni- Painavu -Kumily (NH 183) .
NH 744 Kollam - Aryankavu .
NH 766 Kozhikode - Muthanga .
NH 966 Ramanattukara - Palakkad .
NH 966A Kalamassery - Vallarpadam .
NH 966B Kundannoor - Willington Island .



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കേരള സാഹിത്യം ഭാഗം -2

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ചലച്ചിത്രത്തിന്റെ  പൊരുള് - വിജയകൃഷ്ണന് (ഉപന്യാസം).
ചെമ്മീന് - തകഴി (നോവല്).
തട്ടകം - കോവിലന് (നോവല്).
തത്ത്വമസി - സുകുമാർ അഴിക്കോട് (ഉപന്യാസം).
ദി ജഡജ്മെന്റ് - എന്. എന്. പിള്ള (നാടകം).
ദൈവത്തിന്റെ കാന് - എന്. പി. മുഹമ്മദ് (നോവല്).
ദൈവവചനങ്ങള് - മമുന്ദന് (നോവല്).
നക്ഷത്രങ്ങള് കാവല് - പി. പദ്മരാജന് (നോവല്).
ആലാടൻ -അണ്ണായിവാര്യര് (കവിത).
നാറനന്തു ഭൃണ്ണ...

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