Opacity property Part 1 - Working against a DIV

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This is fifty-sixth video tutorial of CSS series.

Figure 5https://www.google.co.in/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwie3u632ZDeAhUQeysKHUYVDfYQjRx6BAgBEAU&url=https%3A%2F%2Fstackoverflow.com%2Fquestions%2F23504400%2Fcss-opacity-not-working-in-ie11&psig=AOvVaw1qoed20s-nL_f1W1Z2uLMX&ust=1539976

In this video, you will learn about what opacity is and how to apply opacity.

Opacity is the value which describes the visibility of object for example see below two images:  

 

Here, the second figure is having less opacity and hence less visibility.

So just see the full video to understand it properly.