The coating of a zinc layer on iron is called galvanization. This process involves applying a protective zinc coating to iron or steel to prevent rusting and corrosion. Galvanization is widely used in various industries to extend the lifespan of ...
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The filament of an electric bulb is made of tungsten. Tungsten is chosen for its high melting point and ability to withstand intense heat without melting, making it ideal for producing light when an electric current passes through it.
The SI unit of specific resistance, also known as resistivity, is the ohm-meter (symbol: Ω·m). Resistivity quantifies the intrinsic resistance of a material to the flow of electric current. It is a characteristic property that depends on the material’s composition ...
White light is produced in a tube by heating a filament. The filament, typically made of tungsten, is heated to a high temperature by passing an electric current through it. This causes the filament to emit light across the visible ...
In fiber optic communication, the signal flows in the form of light waves. Optical fibers transmit data using pulses of light that travel along the fiber’s core, which is typically made of glass or plastic. These light waves carry digital ...
For the treatment of presbyopia, bifocal lenses are used. Presbyopia is caused by the loss of elasticity in the eye’s lens, making it difficult to focus on close objects. Bifocal lenses have two distinct optical powers: one for distance vision ...
In a camera, a convex lens is used. Convex lenses focus light rays to a point, enabling the camera to capture clear and sharp images. By converging light, they ensure that the image formed on the film or sensor is ...
If a person cannot see distant objects clearly, the defect in vision is near sightedness. Near sightedness, or myopia, occurs when light entering the eye is focused in front of the retina instead of directly on it, causing distant objects ...
Light can be separated into its constituent colors using a prism. When white light passes through a prism, it undergoes dispersion, where different wavelengths (colors) of light bend by different amounts, creating a spectrum of colors from red to violet.
When red glass is heated at high temperature, it will appear green. This phenomenon occurs due to changes in the glass’s structure at high temperatures, altering its light absorption properties and causing it to transmit green light instead of red.