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New answer posted
2 months agoContributor-Level 10
A camera lens focuses the light onto a light-sensitive surface like film or a digital sensor for capturing an image. The camera lens gathers as much light as possible for forming a clear and bright image. This lens focuses the collected light on a specific point like camera's film or its digital sensor. The focus is achieved due to the curvature of lens and the arrangement of its optical elements. This lens refracts light rays so that they converge at focal plane where film/sensor is located.
New answer posted
2 months agoContributor-Level 10
The following happens when light refracts from a prism:
- When a white light passes through prism, it is separated into its constituent colours. This separation occurs because different colours of light are refracted in different amounts. This is known as dispersion.
- Prism's refractive index varies with the wavelength of light. This causes shorter wavelengths to bend more than longer wavelengths. Due to the variation in bending, spread of colours is visible in rainbow.
- After being dispersed within the prism, light rays reach second surface of the prism. Here, light rays again undergo refraction as they exit the prism and re-enter air.
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