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iOS i.e., iPhone  OS is a mobile operating system , is one of the most popular mobile operating system after Android in the modern civilizations ( iOS is now the second popular operating system ) , is  created  and developed by Apple Inc. exclusively for its hardware .i OS- runs the iPhone , iPad and iPod ( a portable media player) Touch devices . There are more than 2.1 million iOS apps available for download in the Apple App Store (as of March 2018), is uncovered in 2007 for iPhone. These mobile apps have collectively been downloaded more than 130 billion times. iOS has been extended to support other Apple devices such as the iPod Touch ( Sep 2007 ) and the iPad (January 2010). Who is the founder of Apple Inc? : Founders - Steve Job,                   Steve Wozniak,                   Ronald Wayne. iOS is the best known for searing as the underlying software that allows iPhone users to interact with their phones using gestures such as swiping, tapping and pinching. Th

Introduction : When a beam of monochromatic light (radiation) is allowed to pass through a transparent medium (solid, dust-free liquids and gasses), a fraction of the incident (incoming) radiation gets scattered. Most of the scattered radiations have the same frequency as the incident one. But few are scattered with a difference in frequency. This type of scattering, first observed in liquids by the Indian Physicist C V Raman in 1928, is known as Raman Effect or Raman Scattering.   Definition :  This is a phenomenon in spectroscopy i.e., change in the wavelength of light that occurs when a light beam is deflected by molecules. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of the scattered light is of unchanged wavelength. A small part, however, has wavelengths different from the wavelength of the incident light, its presence

  Android is a mobile operating system developed by Google, released with the first commercial Android device launched in September 23, 2018. This OS initially developed by Android.Inc; which Google bought in 2005. It is based on a modified version of the Linux kernel and other open source software (like Google play) and is designed primarily for touch screen devices such as smartphones and tablets. Now Google has further developed Android TV for Television, Android Auto for cars and Wear OS for wrist watches, each with a specialized user interface.                                                Fig: Android Logo The operating system since gone through multiple major releases with the current version being 9 "pie", released in August 2018. The core Android source code is known as the Android Open Source Project (AOSP ) and is primarily  Licensed under the Apache License. Android has been the best selling OS worldwide on smartphones since 2011 and on tabl