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Author Archives: admin

Black body radiation and planck’s radiation law

What is black body radiation in physics? When a body is heated,it emits radiation.The nature of the radiation depends upon the temperature.At low temperature,a body emits radiation which is principally of long wavelengths in the invisible infrared region.At high temperature ,the proportion of shorter wavelength radiation increases. Furthermore,the amount of emitted radiation is different for different wavelengths.It is of interest ...

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Types of physical quantities

Physical quantities are those quantities which can be measured.Basically there are two types of physical quantities (Base quantities or fundamental quantities) and (Derived quantities). These are quantities that are used to describe the laws of physics. Physical quantities may be divided into six categories. Constant or ratio Such quantities have the only magnitude, for example, refractive index, dielectric constant and ...

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types of motion in physics with examples and pictures in daily life

What does motion mean? “A body is said to be in motion,if it changes its position with respect to its surroundings.” Surroundings are the places in its neighborhood where various objects are present.The state of rest or motion of a body is relative.For example,a passenger sitting in a moving bus is at rest because he is not changing his position ...

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difference between microscope and telescope in tabular form

Microscope and telescope are two optical devices and are used for different purposes.Microscope is an optical device which is used to see very small objects ( Unicellular organisms),While telescopes is an optical instrument which is used to see very large objects in space.More difference between microscope and telescope are given in the table below.  microscope and telescope comparison table   ...

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Difference between conductors and insulators with examples

The difference between conductors and insulators is that conductors are those materials that conducts electric current easily while insulators are those materials which do not conduct current easily. Conductors A conductor is a material that easily conducts electrical current.Most metals are good conductors.The best conductors are single element materials,such as copper(Cu),silver(Ag),gold(Au),which are characterized by atoms with only one valence electron ...

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What is the difference between emf and potential difference?

The emf (electromotive force) is the the potential difference between the terminals of a battery when no current is flowing through an external circuit when the circuit is open.Potential difference is the voltage across the terminals of the battery when the current is being drawn from it to an external. If you want to learn difference between emf and potential ...

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Pascal law and its applications

What is Pascal’s Law and how do we use it? An external force applied on the surface of a liquid increases the liquid pressure at the surface of the liquid. This increase in liquid pressure in transmitted equally in all directions and to the walls of the container in which it is filled. This result is called Pascal’s principle which ...

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How does a Diffraction grating work?

“The diffraction grating is a useful device for analyzing light sources.It consists of a large number of equally spaced parallel slits.”Its working principle is based on the phenomenon of diffraction.The space between lines act as slits and these slits diffract the light waves thereby  producing a large number of beams which interfere in such a way to produce spectra. A ...

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What is difference between electric potential and potential difference?

Electric potential at a point in an electric field is equal to the amount of  work  done in bringing a unit positive charge from infinity to that point.While Potential difference is the work done in carrying a unit positive charge from one point to another point while keeping the charge in equilibrium.Electric potential and potential difference both have same unit ...

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Mass of earth and radius in physics

Earth is the third planet of our solar system.Everyone want to learn about the earth.For this I have written a blog post for you in which we will learn about mass of earth. If you want to calculate the mass of the earth,then stay with us for few minutes. Let’s see: How to calculate the mass of earth? Consider a ...

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