Physics

Gases and particles in Earth’s atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves.

The electric fuse is based on the heating effect of the current. Electric fuse have low melting point so when high current flow through fuse wire it heated and melted and break down the electric circuit.

The reciprocating compressor is the most popular type of AC compressor.

The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in rems.

When Milk is churned vigorously the cream from it is separated out due to Centrifugal Force. Churning physically agitates the cream until it ruptures the fragile membranes surrounding the milk fat.

An electron microscope gives higher magnification than an optical microscope because the wavelength of electrons is smaller than wavelength of visible light. Hence, making electron microscope to resolve objects that are very small more clearly.

The low-frequency end of the window is limited by signals being reflected by the ionosphere back into space, while the upper limit is caused by absorption of the radio waves by water vapour and carbon dioxide in the atmosphere.

An object having the capability to do work is said to possess Energy.

A type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation is used in sunglasses. Sunglasses or sun glasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are coloured, polarized or darkened. In the early 20th century they were also known as sun cheaters. The colour of the lens can vary depending on style, fashion, and purpose, but for general use, red, grey, green, or brown are recommended to avoid or minimize colour distortion, which could affect safety when, for instance, driving a car or a school bus.