Stars are self luminous objects that shine by radiation obtained from energy sources that are found within them. The sun is a typical star. Stars […]
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Uses of Gold-Leaf Electroscope and the Electrophorus
Gold-Leaf Electroscope is one of the instruments used for testing positive and negative charges. It consisted of a metal rod, A to which gold leaves, […]
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Importance of Equipotentials in Electrostatic Fields
In discussing equipotentials, we must admit that the earth must have the same potential with all over, because it is a conductor. In a conductor, […]
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Interference Phenomenon In Thin Wedge Films
A very thin wedge of an air film can be formed by placing a thin piece of foil or paper between two microscope slides at […]
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How to Measure Wavelength Using Newton’s Rings
Newton discovered an example of interference which is known as “Newton’s rings”. In this case a lens L is placed on a sheet of plane […]
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How to Measure Wavelength Using Young’s Interference Bands
A laboratory experiment to measure wavelength by Young’s interference bands is shown in the diagram below. Light from a small filament lamp is focused by […]
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How to Measure Illumination Using the Lummer-Brodhun Photometer
Before we begin to explain the Lummer – Brodhun Photometer, lets first explain what a Photometer is. A photometer is an instrument which can be […]
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Application of Simple Harmonic Motion and Electrical Oscillations
Simple harmonic motion (S.H.M.) occurs when the force acting on an object or system is directly proportional to its displacement x from a fixed point […]
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Differences Between Infrared and Ultraviolet Radiations
The radiant energy which Herschel found beyond the red is now called infra-red radiation, because it is less refracted than the red. Radiant energy is […]
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Application of Electromotive Force in Electricity Generation
A constant potential difference across terminals of a circuit that produces steady current is known as Electromotive force. This electromotive force and the principles underlining […]
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