Im trying out a new image serving solution that serves responsive images. It does so by detecting the img tag elements width and then serving a version of the image that is suitable for that size.
It does so by changing the source of the image from :
Note : How it adds a query string at the end of the URL (in the above example the second version of the image would be served at 1400px wide were as the first one would be the unscaled version)
My question is how the query string at the end of the image url would effect SEO, the alt tag is going to be the same (as its the same image, just at different sizes) would the fact that the image url changes (although the base URl dosnt change(just a query string is added)) effect SEO negatively by making google think that there were several versions of this image or infact they were different images all together ?