What is the difference between classical music and rock music ?

This two type of music are so different from each other . Rostropovich creates music that bring you peace , music that makes you feel relaxed while you are listening to it while Johnny Rotten compose muscic that make you feel energetic . We usually listen to clasical music when we want calm , some people can concentrate better when they have classical  music on , but rock music is definitely not the kind of music you listen to when you want to relax . Also when it comes to make mistake on the stage with Rostropovich this ones are more noticeable due to the public is in silent .On the other hand if rock artist like Johnny Rotten make a mistake the public can help them because they sing with them and maybe they wouldn't even notice the mistakes sometimes . The style of clothes are also different , classical musicians have to dress properly and smart . However , rock artist can dress how they want to . This two type of music have a lot of differences but the important thing is that both make people enjoy the moment and have a good time .