Save guides, add subjects and pick up where you left off with your BBC account. Light is refracted when it enters a material like water or glass. Depending on the density of the material, light will ...
Refraction is the change in direction of light when it passes from one medium to another. The working of a lens is based on the refraction of light when they pass through it. Lens is a transparent ...
World Sight Day 2020: It is observed on the second Thursday of October and this year it falls on 8 October. The day aims to focus attention worldwide on blindness and vision impairment. The Human eye ...
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