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 ...
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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.