Sahiti Swots

Longest continuously 'on' lightbulb ~ The long-lasting bulb, known as Centennial light,  was switched on since 1901. Surprisingly it is not even connected to a light switch though it has backup generators. ~ It was originally supposed to be emitting around 30-60 watts, but right now it just emits around 4 watts. ~ The Phoebus Cartel  , the companies who manufactured bulbs way before the 1920s, worked together to help each other by controlling the supply of lightbulbs. ~ Everything seemed fine until the Cartel got this biggest threat, the everlasting bulbs _See, initially the Cartel did their best to make long-lasting bulbs but once they were almost perfected, the Cartel's sales dropped around 40 million which was not what they expected. - Such a huge loss changed the Cartel's mindset and hence they decided to make it their mission to reduce approximately 1000 years of the lifespan of the lightbulbs. - They claimed that they were doing that for increased efficiency but  ...

Standard Reference Materials(SRMs ): - There's a warehouse set up by the U.S government which has the standard samples for over 1000 substances.... (NIST : National Institute of Standards and Technology make it possible) food and whatnot . - From a *typical diet* sample to human samples...almost everything is available in that warehouse - The people managing this warehouse generally work with other manufacturing companies to create the required samples - They even have international audience , the kind who'd buy the samples of course... -They work with the federal government and sell about 30,000 samples to them annually  - So a *typical diet* SRM ,for example, is made once ● the manufacturer collected all sorts of diet items an average American would eat ● grinded into fine powder and stored in a small glass bottle The sample looks grayish n contains almost all the nutrients the proteins , fats etc., that a diet generally has - What's wild about this warehouse I that it e...

=) What is black light?  - Black light (or) Ultraviolet light is a form of electromagnetic radiation with wavelength from 10 nm to 400 nm, shorter than that of visible light, but longer than X-rays.  -UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. =) Why do substances glow under UV light? - Fluorescent substances absorb ultraviolet light and then glow when they re-emit it. Phosphorescent materials (phosphors) make light much the way fluorescent materials do; they radiate visible light after being energized. Some materials which glow under UV light :- - Highlighters.                                      - Bank notes  - Detergents.                                        - Eggs - Tonic water (quinine content)...