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 Photoperiodism Works in Flowering Plants
Photoperiodism is the influence of the relative lengths of day and night on the activities of an organism. Although the best known example of photoperiodism […]
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Induction Coil – Applications, Working Principles and Uses
The induction coil is a device for getting a high voltage from a low one. It was at one time used for X-ray tubes, and […]
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Application of Doppler Effect in the Measurement of Light
In understanding the application of Doppler effect on the measurement of light, we must note that the speed of distant stars and planet has been […]
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Working Principles and Uses of the Abbe Refractometer
The Abbe Refractometer is designed to measure the refractive index of liquids, glass, plastics and film. It requires a sample, an index liquid (that matches […]
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6 Fundamental Differences Between Light and Sound Wave
There are some basic and fundamental properties peculiar to a light and sound wave that differentiates one from the other. These differences account for the […]
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Stars, their Spectral Classes and Classification
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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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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