new sun glass

The total population of New York State is 19 million, 39% of which wear glasses. Estimate the total number of people who do not wear glasses. => 22.09 million or 111.59 million or 11.59 million or 32.39 million..

Question: A sheet of glass is used in solar heating devices. Why? Answer: Glass sheet has a property that allows the infra-red rays of short wavelength from the sun to get into the device but does not allow the infra-red rays of longer wavelength to leave th..

Applications of Polarized Light - Polaroids are used in sun glasses. They reduce the intensity and the glare by cutting down the horizontally polarized light. Polarized light is used in photo elastic stress analysis. For 3-D view, special type of glasses, which have po..

When a powerful beam of light is passed through a colloidal solution placed in a dark room, the path of the beam gets illuminated and appears as a glow in the colloidal solution. This is because of scattering of light by the colloidal particles...

Green house gases in the atmosphere behave much like the glass panes in a green house. Green houses are like small glass houses whose transparent glass roof and walls allow sunrays to pass through. It keeps the heat from escaping, thus allowing vegetables and flowers ..

Question: Explain the three R's in the conservation of environment? Answer: The three R's refer to Reduce, Recycle and Reuse. Reduce: Use less electricity by switching off unnecessary lights and fans, save water by repairing leaky taps, do not waste food. Recycle: Materials made of plast..

Thus just as length has units like kilometer, meter, centimeter, millimeter etc., time also has units like year, month, day, hour etc. You must have been hearing quite a lot about the ending of the millennium and starting of the third millennium in the year 2001. Here we have larger units measuring..

Measurement of Time - Thus just as length has units like kilometer, meter, centimeter, millimeter etc., time also has units like year, month, day, hour etc. You must have been hearing quite a lot about the ending of the millennium and starting of the third millennium in the year 2001. Here we have ..

Green House Effect - Before green house effect is studied one needs to know what kind of radiation / sunshine we receive on earth. 'Sunshine' is a common man's term indicating all that we receive from sun. In a shallow perspective of common man, it may simply, mean light. But in a deep sc..

For thousands of years people have looked up at the stars and wondered what lay beyond them. It was once believed that the earth was the center of the universe and that everything moved around it. It was later discovered that the earth moves around the sun. Today, powerful telescopes and ..