From Fleming’s Right Hand Rule, there is a definite relation among current or induced e.m.f. (electromotive force), lines of force and motion of the conductor. Fleming’s Right Hand Rule states that—For a moving wire in a magnetic field, if the thumb, the first and second fingers of right hand are extended at right angles to one another, with the first finger representing the direction of magnetic lines of force and the second finger representing the direction of current flow induced by the wire’s motion, the thumb will be pointing in the direction of motion of the wire.

Alternating current to Direct current

For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain

surface tension

10^-3m

The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour,light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

An optical fiber is a cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along its axis, by the process of total internal reflection. Thefiber consists of a core surrounded by a cladding layer, both of which are made of dielectric materials.

couple acting on a body

A rainbow is a meteorological phenomenon that iscaused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused bysunlight always appear in the section of sky directly opposite the sun

aircraft- The local speed of sound, and thereby the Mach number, depends on the condition of the surrounding medium, in particular the temperature. The Mach number is primarily used to determine the approximation with which a flow can be treated as an incompressible flow.

The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons.

combinations of lenses

10^-9m

Wean’s Displacement Law- Stars emit colors of many different wavelengths, but the wavelength of light where astar’s emission is concentrated is related to the star’s temperature – the hotter thestar, the more blue it is; the cooler the star, the more red it is

Infrared Region- Thermal radiation can have any frequency at all; it depends on the temperature of the radiating body. However, most bodies in the universe have temperatures that make them emit most of their radiation in the visible or infrared part of thespectrum

The principle behind any hydraulic system is simple: forces that are applied at one point are transmitted to another point by means of an incompressible fluid. As is common in hydraulics the initial force which is applied to operate the system is multiplied in the process.

The less dense air at high altitudes gives less resistance to ball.

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.

When excessive current flows the thin wire gets very heated up and melts a bit at last breaking and stopping the current flow.

Newton makes the relation of Force and motion quite clear in his first law of motion – “An object moves with constant velocity unless acted upon by a net external force.”

It is the unit of distance. Parallactic second is nothing but what we call “Parsec”. Parsec is the distance that subtends an arc of 1 second, i.e., 1′’ with 1 Astronomical unit.

Numerically, 1 parsec = 3.26 light years.