Important Scientific Instruments and their usage
Important 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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നാട്ടുരാജ്യ സംയോജനം 18-ആം നൂറ്റാണ്ടിൽ ബ്രിട്ടൻ ഇന്ത്യയിലെ അധീശശക്തിയാകുന്നതിന് നൂറ്റാണ്ടുകൾക്കുമുൻപേ, ഇന്ത്യയിൽ നിലനിന്നിരുന്നതും തുടർന്ന് 1940-കൾവരെ ബ്രിട്ടീഷ് മേൽക്കോയ്മയ്ക്കുവിധേയമായി രാജാക്കന്മാർ ഭരിച്ചിരുന്നതുമായ രാജ്യങ്ങളെയാണ് ബ്രിട്ടീഷ് ഇന്ത്യയിലെ നാട്ടുരാജ്യങ്ങൾ എന്നു പറയുന്നത് . ഇന്ത്യയ്ക്ക് സ്വാതന്ത്ര്യം ലഭിക്കുന്ന സമയത്ത്‌ 565 ഓളം നാട്ടുരാജ്യങ്ങളാണ...
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