particle properties of light

Particle Nature of Light - According to wave theory when light falls on a metal surface, energy is continuously distributed over the surface. All the free electrons receive light energy and when the energy received exceeds that of work function, an electron m..

According to wave theory when light falls on a metal surface, energy is continuously distributed over the surface. All the free electrons receive light energy and when the energy received exceeds that of work function, an electron may escape the surface. If we user a low i..

They are deflected by electric and magnetic fields. The deflection is less compared to that of b particles, because a particles are heavy. They affect a photographic plate and cause fluorescence on striking a fluorescent material. They ionise the gas through which th..

Summary - When a ray of light is incident on a boundary separating the two media having different densities: A part of the light gets reflected. Rest of the light changes its direction as it enters the second medium. The change of direction suffered by a ray of li..

Right grade or particle size of talc is important. A coarse talc has poor adhesiveness and is abrasive. The particle size of talc should be less than 74 microns for face powder. The powder becomes soft, fluffy, light and transparent when the talc is of the right natur..

Upto the year 1924, electron was exclusively regarded as a particle. However, in 1924, de-Broglie suggested that an electron behaves both as a material particle and as a wave. Just like light, some experimental facts can be explained by assuming electrons as tiny ..

1. Calcium oxide is a white amorphous solid. 2. It is not decomposed further when heated, but produces a white brilliant light above 2732 o F. This light is called lime light. 3. It combines vigorously with water to form slaked lime (Calcium hydroxide). The process is ..

Tyndall Effect - The earth's atmosphere is a heterogeneous mixture of minute particles. These particles include smoke, tiny water droplets, suspended particles of dust and molecules of air. When beam of light strikes such air particles, the path of ..

50% Anti-corrosion agent 6% Optical brightener 0.3% Water and inorganic filler 19.7% Tripolyphosphate can produce hydroxyl ions by reacting with water. It keeps the wash water slightly alkaline, to emulsify grease particles. They can also tie up calcium and magnes..

Scattering of Light - When light passes through a substance or gas, a part of it is absorbed and the rest scattered away. The basic process in scattering is absorption of light by the molecules followed by re-radiation in different directions. The strength of scatterin..