http://en.wikipedia.org/wiki/Cloud_chamber
A cloud chamber is a commonly used apparatus for detecting nuclear particles, as the particles leave visible trails of droplets behind as they pass through the chamber. This allows scientists to observe and study the pathways and properties of these particles.
A gas-filled chamber is typically used to detect trajectories of nuclear particles using charged wires. As a particle passes through the chamber, it ionizes atoms in the gas, creating electron-ion pairs. The resulting charges are collected by the wires to track the path of the particle.
There are two types of smoke detectors:Alpha particle - these do not use electromagnetic wavesPhotoelectric - these use a beam of either visible lightor near infrared electromagnetic waves
The light that our eyes can detect is known as visible light.
A cloud chamber works by creating a supersaturated vapor environment, where ionizing radiation passing through the chamber causes the vapor to condense into tiny droplets, making the path of the radiation visible.
They can detect both visible light and infrared radiation.
to detect animals using photographing to see
A Geiger counter, also called a Geiger-Müller counter, is a type of particle detector that measures ionizing radiation. They detect the emission of nuclear radiation: alpha particles, beta particles or gamma rays. A Geiger counter detects radiation by ionization produced in a low-pressure gas in a Geiger-Müller tube
The purpose of the fluorescent screen in Rutherford's experiment was to detect the alpha particles that were deflected when they struck the gold foil. The screen would light up when hit by the alpha particles, allowing Rutherford to observe and measure the deflection pattern and infer the structure of the atom.
The visible spectrum
The Tyndall effect was discovered by the 19th-century physicist John Tyndall. He observed that when light passes through a colloidal solution, the particles in the solution scatter the light, making the beam visible. This effect is used to detect the presence of colloidal particles in a solution.
Geiger counter.