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Well, first of all I’d say nice question. I’m pretty sure not many people (especially Indians) know about them or even heard of them. I’ll try to go in a systematic way -BSE - Bombay Stock Exchange. Ever heard of Dalal Street? How about Wall Street? Surely you’ve heard about Wall Street.Source :- WikipediaWell, Dalal Street is India’s Wall Street. You got that right. BSE is situated on Dalal Street, Mumbai.(Just like New York Stock Exchange on Wall Street)It was Asia’s first stock exchange (established : 1875) and is one of the foremost stock exchanges of the world (11th by market capitalization) and the most major one in India. For more details see Bombay Stock Exchange.Source - Google ImagesBSE SENSEX - Bombay Stock Exchange Sensitive Index. It is a type of list (stock market index) of 30 of India’s strongest companies. For a full list of all those companies, see List of BSE SENSEX companiesThese companies are the companies which do most of the trading in the BSE.They are also known as BSE 30, S&P BSE Index, or simply Sensex.For more details, see BSE SENSEX.Source: Google ImagesNSE - National Stock Exchange of India Limited. Located in Mumbai, it was the first stock exchange in India to get fully automated electronics. It is also the second major stock exchange in India.For more details, see National Stock Exchange of IndiaSource - http://www.nseindia.comSource: Google ImagesNIFTY 50 - Nifty 50 is the NSE’s benchmark stock market index. It is the largest single largest financial product in India. It has 50 well known and good performing companies. You should know that it may change if any company does not perform well.For more details, see NIFTY 50.Source - http://www.nseindia.comSEBI - Securities and Exchange Board of India. SEBI is the regulator for the securities market in India. It was established in 1988. You can understand some of its functions by its preamble -"...to protect the interests of investors in securities and to promote the development of, and to regulate the securities market and for matters connected there with or incidental there to".Source - Wikipedia.For more details, see Securities and Exchange Board of IndiaThere is already a question on Quora on the difference between stock market and share market.See this - What is the difference between a stock market and a share market?Still, I will try my best to explain it.There is not much difference between the two. The difference is in the context of its usage. "Stock" is a general term used to describe the ownership certificates of any company and "shares" refers to a the ownership certificates of a particular company.If you say you own stocks, it means that you have ownership in one or more companies.If you say you own shares, it means you have the stock of a particular company and the question people may ask is - ‘Shares in which company?’Note - I really recommend you follow the links I have provided to get a complete understanding of these terms. Initially I was also confused but you can understand all these with a little hard work. Hope you find my answer helpful.Best of luck!!!

People with good high school physics concepts might understand it after seeing it twice. People with formal physics knowledge might get it at first look.Anyway, it's a funny representation of the Doppler Effect.For more details, google “Doppler Effect” and “Red Shift”. In simplest terms, the change in length and color of the car represents the change in wavelength and frequency of the light wave, due to the relative motion between source and observer.Credit: Science Humour (fb)