LASER
LASER stands for Light Amplification by Stimulated Emission of Radiation.
LASER का full form Light Amplification by Stimulated Emission of Radiation है।
The source describes LASER as a device producing an intense, coherent and highly directional beam of a single frequency which can travel a great distance without spreading significantly.
Source LASER को intense, coherent और highly directional single-frequency beam produce करने वाला device बताता है।
LASER Technology in India / भारत में लेजर तकनीक
According to the source, in 1964 the first Gallium Arsenide semiconductor laser in India was designed and fabricated by Bhabha Atomic Research Centre, BARC.
Source के अनुसार 1964 में Gallium Arsenide semiconductor laser BARC द्वारा designed और fabricated किया गया।
The source also mentions CAT, DRDO and IISc in connection with work on laser plasma and quantum optics.
MASER
MASER stands for Microwave Amplification by Stimulated Emission of Radiation.
MASER का full form Microwave Amplification by Stimulated Emission of Radiation है।
The source states that it was invented by Gordon, Gieyer and H. Townes in 1952. It uses amplified microwaves of longer wavelength, whereas an ordinary laser uses light.
Important Units of Measurement / महत्वपूर्ण मात्रक
- Length / लंबाई → Metre
- Time / समय → Second
- Mass / द्रव्यमान → Kilogram
- Area / क्षेत्रफल → Square metre
- Volume / आयतन → Cubic metre
- Velocity / वेग → Metre/second
- Acceleration / त्वरण → Metre/second²
- Density / घनत्व → Kilogram/metre³
- Momentum / संवेग → Kilogram-metre/second
- Work / कार्य → Joule
- Energy / ऊर्जा → Joule
- Force / बल → Newton
- Pressure / दाब → Pascal or Newton/metre²
- Frequency / आवृत्ति → Hertz
- Power / शक्ति → Watt
- Impulse / आवेग → Newton-second
- Angular Velocity / कोणीय वेग → Radian/second
- Viscosity / श्यानता → Newton-second/metre²
- Surface Tension / पृष्ठ तनाव → Newton/metre
- Heat / ऊष्मा → Joule
- Temperature / तापमान → Kelvin
- Resistance / प्रतिरोध → Ohm
- Electric Current / विद्युत धारा → Ampere
- Electromotive Force / विद्युत वाहक बल → Volt
- Electrical Conductivity / विद्युत चालकता → Mho/metre in source
- Electric Energy / विद्युत ऊर्जा → Kilowatt-hour
- Electric Power / विद्युत शक्ति → Kilowatt or Watt
- Charge / आवेश → Coulomb
- Intensity of Sound / ध्वनि तीव्रता → Decibel in source table
- Power of Lens / लेंस की शक्ति → Dioptre
- Depth of Sea / समुद्र की गहराई → Fathom