How to search google by image

Another big step by the search master google. Now you can search entire web with an image on google. There are many options Drag and drop , upload from your PC and URl of an image .
Let us see an example by an image URL .
» Goto images.google.com . You will see the camera symbol at the end of search box , just click that symbol.
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» Paste image URL in the search box and press search ( Ex:- paste this url “http://upload.wikimedia.org/wikipedia/en/e/e4/Steve_Jobs_by_Walter_Isaacson.jpg”)
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» Now you will see the results . Amazing @!
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please watch this video for more details.