Physics

Basic objective of this lecture is to present on Weather Balloon. A Weather Balloon measures weather conditions higher in the atmosphere. Measures temperature, air pressure, wind speed and…

General objective of this lecture is to present on Rain Gauge. A Rain Gauge is used to measure amount of rainfall. An official Rain Gauge consists of…

A Wind Vane is used to measure wind direction.  It spins on a rod and points in the direction from which the wind comes. The wind…

A Hygrometer is an instrument used to measure the humidity of the air. A mechanical Hygrometer uses human or horse hairs which stretch as they absorb…

A Windsockis used at airports to indicate wind direction for takeoffs and landings. They help the pilots select the proper runway so that they can take…

This lecture introduce on Anemometer. An Anemometer measures wind speed. The cups catch the wind, turning a dial attached to the instrument. The dial shows the wind speed.…

A Psychrometer measures relative humidity. Two thermometers are used in a Psychrometer. A wet cloth covers the end of one of the thermometers. Water evaporates from…

Principle objective of this lecture is to present on Barometers. A Barometer measures air pressure. An Italian scientist named Torricelli built the first barometer in 1643. People still…

Major objective of this lecture is to present on Thermometers. A Thermometermeasures air temperature. A Thermometer works because matter expands when heated. Most thermometers are closed glass tubes…

Basic objective of this lecture is to present on How Do We Predict Weather. Since air masses interact in a relatively predictable way, meteorologists are able to…

General objective of this lecture is to present on Optical Illusions. An optical illusion is a visual stimuli that is perceived by the eyes and then comprehended…

Kirchhoff’s Laws of Spectral Line focus on: Light of all wavelengths shines on an atom. Only light of an energy equal to the difference between “floors” will…