Curie point also called Curie Temperature, temperature at which certain magnetic materials undergo a sharp change in their magnetic properties. In the case of rocks and minerals, remanent magnetism appears below the Curie point-about 570 ° C (1,060 ° F) for the common magnetic mineral magnetite. This temperature is named for the French physicist Pierre Curie, who in 1895 discovered the laws that relate some magnetic properties to change in temperature

Work is the measure of aquantity that is capable of accomplishing Macroscopic Motion of a System due to the action of a Force over a Distance. Torque is the tendency of a force to rotate an object about an axis, fulcrum or pivot.

The bar is a non-SI unit of pressure. It is defined by the IUPAC as exactly equal to 100,000 Pa or 10⁵ Pa.

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography

• High pressure in the pressure cooker raises the boiling point of water and rice is cooked faster.
• The trapped steam increases the atmospheric pressure inside the cooker by 15 pounds per square inch. At that pressure, the boiling point of water is increased from 212°F to 250°F. This higher temperature is what cooks food faster.

Surface tension is the elastic tendency of liquids which makes them acquire the least surface area possible. Surface tension is an important property that markedly influences many ecosystems. Therefore a small drop of oil spreads over water because water has higher surface tension.

• Red colour appears on the upper side of a rainbow and violet colour on the lower side. VIBGYOR represents Voilet, Indigo, Blue, Green, Yellow, Orange and Red in series innermost to the outermost.
• In a Secondary rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, with red on the inner side of the arc.

In photography, shutter speed or exposure time is the length of time a camera's shutter is open when taking a photograph. The amount of light that reaches the film orimage sensor is proportional to the exposure time.

The amount of incident-wave energy that is reflected from a surface depends on the nature of the surface and the angle at which the wave strikes the surface.

The amount of wave energy reflected increases as the angle of incidence increases.

The ohm is defined as an electrical resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces in the conductor a current of 1 ampere, the conductor not being the seat of any electromotive force.