Following are the quantities and units in physics.QuantityUnitLengthMeterForceNewton EnergyJouleResistanceOhmVolumeLitreAngleRadiansPowerWattPotentialVoltTimeSecondCurrentAmpereLuminosity CandelaWorkJoulePressurePascalAreaHectareTemperature DegreesConductivity MhoMagnetic fieldOr

Following are the instruments and measurements.InstrumentsMeasurementsBarometerPressureThermometerTemperatureAnemometer Wind vane OdometerSpeedScaleLengthBalanceMassRain GaugeRainHygrometerHumidityAmmeterCurrentScrew gauge thicknessSeismograph Earthquake Sphygmomano meter&nb

A Mirage is a naturally occurring optical phenomenon in which light rays bend to produce a displaced image of distant objects or the sky.

(a) It is caused due to Total internal Reflection.
(b) It is an optical illusion observed in deserts or hot summer days due to which a person sees a pond of w

1. What is nuclear fission?

The process of breaking up of the nucleus of a heavy atom into two nearly equal fragments with the release of a large amount of energy is known as nuclear fission.


2. What is nuclear fusion?

The process of combining two or more lighter nuclei to form a heavier 

In 1905, Albert Einstein determined that the laws of physics are the same for all non-accelerating observers and that the speed of light in a vacuum was independent of the motion of all observers.

As a result, he found that space and time were interwoven into a single continuum known as space-tim

Q&A 1. Energy of the Sun is generated by – Nuclear fusion 

Q&A 2. When the TV is switched on,- Visualization starts immediately, but audio is heard later, because sound travels at a lower velocity than light.

Q&A 3. Which principle is used to produce minimum temperature – superconductivity