Modern uses and any three applications of refraction
Answers
A lens is a transparent material that refracts light rays to converge at a single point. Lenses are designed in such a manner that light entering them is focused by refraction into a focal point, producing a magnified image of an object.
Lenses are commonly used in binoculars and telescopes allowing for comprehensive images of distant objects, or in magnifying glasses and microscopes to view small objects, such as microorganisms, which are not visible to the naked eye. The human eye contains a convex lens that refracts light onto the retina for sight, and can change shape to modulate the distance of focus.
Refraction is also used in prisms. A prism is a wedge-shaped device which causes incident light to be split into different colours. The refractive index of a material varies with the wavelength incident upon it, which results in a phenomenon called dispersion where the different wavelengths of light refract by different amounts and create a rainbow effect. This allows the light source to be studied in detail.