Angstrom: For measurement length of light waves.
Barrel: For measuring liquid. 1 barrel = 31.5 gallon or 7326.5 cubic inches.
Cable: For measuring length of cables. 1 cable = 183m.
Carat: Use for measuring precious stones. It also measure purity of gold alloy.
Fathom: It is used for measuring depth of water. 1 fathom = 4 inches.
Knot: for measuring speed of ships.
Unit of temperature
Celsius or centigrade °C, Fahrenheit °F, Kelvin K.
0 degree Celsius = 273.15 Kelvin = 32 Fahrenheit
Pressure - force applied to surface. SI unit is Pascal - Pa. It is derived unit.
1 Pa = 1 Newton per square meter.
Unit: Pascal, atm, torr
1 atm = 101325 Pa = 760 torr
Light intensity or Luminous Intensity measure of wavelength-weighted power emitted by a light source in particular direction per unit solid angle. SI unit is Candela
OTHERS
Astronomical Unit (au or ua) unit of length, roughly distance between Earth to the Sun.
Light year: Distance travel by light in one year. about 10 trillion km.
1 Parsec = 3.26 light years
Important Scientific Instument
Barrel: For measuring liquid. 1 barrel = 31.5 gallon or 7326.5 cubic inches.
Cable: For measuring length of cables. 1 cable = 183m.
Carat: Use for measuring precious stones. It also measure purity of gold alloy.
Fathom: It is used for measuring depth of water. 1 fathom = 4 inches.
Knot: for measuring speed of ships.
Unit of temperature
Celsius or centigrade °C, Fahrenheit °F, Kelvin K.
0 degree Celsius = 273.15 Kelvin = 32 Fahrenheit
Pressure - force applied to surface. SI unit is Pascal - Pa. It is derived unit.
1 Pa = 1 Newton per square meter.
Unit: Pascal, atm, torr
1 atm = 101325 Pa = 760 torr
Light intensity or Luminous Intensity measure of wavelength-weighted power emitted by a light source in particular direction per unit solid angle. SI unit is Candela
OTHERS
Astronomical Unit (au or ua) unit of length, roughly distance between Earth to the Sun.
Light year: Distance travel by light in one year. about 10 trillion km.
1 Parsec = 3.26 light years
Important Scientific Instument
- Accumulator : Electrical energy is stored
- Altimeter : Used in aircraft for measuring altitudes
- Ammeter : Measuring the electrical current in amperes
- Anemometer : Measuring the strength of winds
- Audiometer : Evaluating hearing acuity(तीक्ष्णता)
- Audiophone : It is used for improving imperfect sense of hearing.
- Barometer : Measuring atmospheric pressure
- Binocular : An optical instrument designed for magnified view of distant objects by both eyes simultaneously
- Cardiogram : For recording the heart movements
- Calorimeter : Measuring of quantities of heat
- Chronometer : A clock that keeps very accurate time as the one that is used to determine longitude at sea.
- Colorimeter : An instrument for comparing intensities of colour.
- Commutator: An instrument to change or remove the direction of an electric current, in dynamo used to convert alternating current into direct current.
- Cyclotron : Studying the properties of atoms by smashing them.
- Dynamo : A device for converting mechanical energy into electrical energy
- Dynamometer :An instrument for measuring the electrical power
- Electroscope : An instrument for detecting the presence of electric charge.
- Galvanometer : For detecting and measuring electric current
- Phonograph : For reproducing sound
- 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 aeroplane by means of radio micro waves
- Radiometer : An instrument for measuring the emission of radiant energy
- Radio Micrometer : An instrument for measuring heat radiations
- Rain Gauge: An instrument for measuring rainfall
- Rectifier : An instrument used for the conversion of AC into DC.
- Refractometer: An instrument used to measure the refractive index of a substance
- Resistance Thermometer : Used for determining the electrical resistance of conductors
- Salinometer: A type of hydrometer used to determine the concentration of salt solutions by measuring their
- densities
- Seismometer (Seismograph) : An Apparatus for measuring and recording earthquake shock
- Sextant : For guiding ships or surveying land.
- Spectroscope: An instrument used for spectrum analysis
- Speedometer : It registers the speed at which the vehicle is moving
- Spherometer: For measuring curvature of surfaces
- Sphygmomanometer : An instrument used to detect blood pressure in a human body. It is also called B.P.Apparatus
- Sphygmophone: Instrument with the help of which, a pulse beat makes a sound
- Spring Balance : Useful for measuring weight
- Stereoscope: It is used to view two dimensional pictures.
- Stethoscope: An instrument which is used by the doctors to hear and analyze heart and lung sounds.
- Stroboscope: It is used to view rapidly moving objects.
- Tachometer : An instrument used in measuring speeds of aero planes and motor boats.
- Teleprinter : This instrument receives and sends typed messages from one place to another.
- Telescope : It views distant objects in space.
- Theodolite : It measures horizontal and vertical angles.
- Transistor : A small device which may be used to amplify currents and perform other functions usually performed by
- a thermionic valve
- Vernier: An adjustable scale for measuring small sub divisions of scale
- Viscometer : For measuring viscosity
- Voltmeter : To measure potential difference between two points