General Physics

Circuit breaker usually operate under transient state of short-circuit current.

Guglielmo Marconi sent out the first wireless signals. In the early summer of 1895 and despite an intervening hill, Marconi achieved signal transmission and reception over a distance of about 2km. Success was indicated initially by the waving of a handkerchief and progressed to the need to fire a gun.

The spectrum of the Sun’s solar radiation is close to that of a black body with a temperature of about 5,800 K. The Sun emits Electromagnetic radiation across most of the electromagnetic spectrum. Although the Sun produces Gamma rays as a result of the nuclear fusion process, these super high energy photons are converted to lower energy photons before they reach the Sun’s surface and are emitted out into space.

An electron microscope uses a beam of electrons to illuminate a specimen and produce a magnified image. An electron microscope (EM) has greater resolving power than a light-powered optical microscope because electrons have wavelengths about 100,000 times shorter than visible light photons. Magnification is the process of enlarging something only in appearance, not in physical size.

According to National Institute of occupational safety and health, Under dry condition, the resistance of the human body is 100,000 ohms. Under wet condition, the resistance is reduced to 1000 ohms.

In electricity, a battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. A battery is a device that converts chemical energy directly to electrical energy.

Details

Details

Details

Gamma rays can cause Gene mutation.

Green house effect is the heating up of the Earth's atmosphere which is due to infrared rays.

Visible light has a higher frequency than radio waves.

Infrared radiation has the longest wavelength.

Infrared is used in night vision equipment when there is insufficient visible light to see. Night vision devices operate through a process involving the conversion of ambient light photons into electrons which are then amplified by a chemical and electrical process and then converted back into visible light.

The power source such as a Battery of an IED creates an electrical charge. An Improvised Explosive Device (IED) is a bomb constructed and deployed in ways other than in conventional military action.