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Author Archives: admin

Why radio waves diffract around buildings?

Diffraction of radio waves The phenomenon of bending of waves around the corners of an obstacle or opening placed in its path is called diffraction.The phenomenon is found to be prominent when wavelength of the waves is comparable with the size of the obstacle or opening. Radio waves are of large wavelengths and the size of obstacles and openings of ...

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kelvin temperature scale with formula and examples

How to convert kelvin to degrees Celsius? Temperature on Celsius scale can be converted into kelvin by subtracting 273 from temperature in kelvin scale. Kelvin to celsius formula  C = T (k) – 273 Kelvin to ºC example problems Convert 300 kelvin to ºC Solution: T = 300 k Formula:       C = T (k) – 273 C = (300 ...

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Celsius to kelvin conversion formula with examples

How to convert degrees  celsius to kelvin The temperature on kelvin scale can be converted by adding 273 in the temperature Which is in degree centigrade C on Celsius scale.Its formula is given as:          T (k) = 273 + C 0 ºC to kelvin C = 0 ºC As   T = 273 + C T = ...

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Why diffraction grating have closely spaced rulings?

A diffraction grating is a glass plate having a large number of close parallel equidistant slits mechanically ruled on it.A diffraction grating is used to study the diffraction effects of light. Since the phenomenon of diffraction is found to be prominent when the wavelength of light is large as compared with the size of the opening or aperture of the ...

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Difference between latent heat of fusion and latent heat of vaporization

Latent Heat of Fusion Definition Heat energy required to change unit mass of a substance from solid to liquid state  at its melting point without change in its temperature is called its latent heat of fusion. When a substance is changed from solid to liquid state by adding heat, the process is called melting or fusion. The temperature at which ...

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micrometer screw gauge measurement with least count formula

What is the micrometer screw gauge? It is an instrument used to measure diameter of thin wires, thickness of small sheets of glass,plastic etc. It can measure upto 1/10 of mm (or 0.01 mm= 0.001 cm) which is usually called the least count of screw gauge. Parts of screw gauge It consists of a U-shaped metal frame F with a ...

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How to use vernier caliper?

Vernier caliper is an instrument used to measure the length,diameter,radius etc. It can measure up to 1/10 of mm (or 0.1 mm 0.01 cm) which is called least count of V.C . There are two scales of V.C Vernier scale Main scale Main scale is graduated is centimeter while Vernier scale slides along the main scale and is graduated in ...

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Stopwatch:How to read digital and analog stopwatch?

Stopwatch in physics definition A stopwatch is used to measure the time interval of an event. Types of stopwatch Digital stopwatch Mechanical stopwatch How to read Digital stop watch? It is commonly used in laboratories,it can measure a time interval up to 0.01 second.It starts to indicate the time lapsed as the start/stop button is pressed.As soon as start/stop button ...

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Significant figures and scientific notation with Rules and examples

 Scientific notation definition In scientific notation a number is expressed as some power of ten multiplied by a number between 1 and 10. A simple and scientific method to write small or large numbers is to express them in some power of 10.The distance of moon from Earth is 384000000 meters.This is large number,it can also be expressed as 3.84×10 8 m.This ...

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Different branches of physics with definitions and topics

What is physics? The branch of science which deals with the interaction of matter and energy is called physics. The rapid progress in science during the recent years has become possible due to discoveries and inventions in the field of physics.The technologies of our modern society throughout the world are related to physics.For example a car is made on the ...

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