Pyrometers are instruments used in measuring high temperatures. It has found use extensively in several industrial processes where they are used in temperature monitoring and […]
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Application of Joule-Kelvin Effect in Gas Liquefaction
The Joule-kelvin effect is one of the fundamentally important phenomena in physics. Joule’s crude experiments on the expansion of a gas into a vacuum(free expansion) […]
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How Regnault’s Dew Point Hygrometer Works
Regnault’s dew point hygrometer is an instrument used in hygrometry to measure relative humidity. However many forms of dew point hygrometer have been devised, but […]
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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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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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