B. about 250 millimeters in front of the lens
pg. 41 Figure 28
they are formed at the point of contact of lens and glass plate
The image is magnified,virtual and upright
For Light to emit properly with out any incident of light happening the glass is kept thin and clear
fringes are formed in air film inspacebetween lens and glass plate
The cold water reduces the temperature of the glass. The cold glass reduces the temperature of the air around the glass. The amount of moisture in air is temperature dependant hotter air can contain a higher moisture content. If the air temperature is reduced the water condenses. In this case the cold glass reduces the air temperature in contact with the glass, this results in the condenstion of moisture from the air, and water droplets are formed.
Rainbow
250 millimeters in front of the lens
250 millimeters in front of the lens
Glass is formed from sand or silica.
Obisidian is formed when resedue from an active volcanco is cooled rapidly. Obisidian is an extrusive igneous rock made of a glass like substance formed from naturally occuring volcanic glass.
Most glass is made from a molecule called Silica.
Simple Techniques in Shaping Glass - 1973 was released on: USA: 1973
Diamonds are formed from carbon, as you state; glass is formed from silica. The two are not related, except that some glass and some diamonds appear similarly.
You get sand, then you smelt the sand into glass. Simple as that.
Fulgurites are formed when lightning strikes sand and a fused glass crystaline shape is formed. The earth was making this natural glass long before man controlled fire.
Mosaic
Mosaic