red hot glass

Take some iron-wool in a combustion tube, and heat it till it becomes red hot. Pass steam over it. Iron gets oxidised to form the magnetic oxide of iron, which is also called ferrosoferric oxide or tri-iron tetroxide. The reaction is reversible and hence, the hydrogen produced ..

Even though all colours of the visible spectrum travel with the same speed in vacuum, the speed of the colours of the visible spectrum varies when they pass through a transparent medium like glass and water. That is, the refractive index of glass is different for different colo..

Dispersion of White Light By a Glass Prism - Even though all colours of the visible spectrum travel with the same speed in vacuum, the speed of the colours of the visible spectrum varies when they pass through a transparent medium like glass and water. That is, the refractive in..

Choose that you would like to do on a cold winter morning. => have a hot chocolate or have a glass of cold water or have an ice cream or none of these..

Suppose it is -10 o C outside. What would you like to have? => Ice cream or A hot chocolate or A glass of cool lemonade..

Hydrogen is prepared by passing alternate currents of steam and water gas over red hot iron. The method consists of two stage..

Any object which allows light to pass through it is known as a transparent object. The color of any transparent object is the color of the light transmitted by it. Ordinary window glass appears white because it allows all the colors in the white light to pass through i..

. We now see that it is a perfect emitter also. Thermal radiation inside a hollow enclosure (that can be let out through the small opening) is thus the radiation emitted by a black body (black body radiation) A remarkable thing is worth noting here. The total radiation emanating out of a non-black ..

Question: Though a hot iron emits radiations, it is not visible to us. Why? Answer: It emits infra-red radiations which are invisible to the eye..

Cyanobacteria - The group cyanobacteria includes another successful group of prokaryotes namely blue green algae. They are photoautotrophic prokaryotes occupying a wide range of habitats. They are predominantly aquatic, found mostly in fresh water bodies. Some species occur in marine water. A few a..