In a galaxy far, far away

Music in film is just as important as the picture itself, they can work together to give whatever feeling the director wishes, which is exactly how music in film is used. For example, if a films opening is very grand and epic then music has to suit, take the 1977 Star Wars opening for example, with the famous writing crawling across the screen. We see stars and read about a big battle and a "Death Star" that has enough power to destroy a planet, and this energy is replicated by the grand orchestral piece. Here is the clip so you can see for yourself one way in which music is used in film.

However, using music to reflect the film isn't the only thing that can be achieved, music can also help describe the landscapes, or even individual characters, staying with Star Wars for the example, here is the theme written by John Williams for the famous Luke Skywalker, a young, inexperienced Jedi. .

In this theme then you can hear the strings are played softly to reflect the innocence and dreams of a young person at the beginning. And then by the end of it the music has grown with the character with a march and trumpets to suggest the fact that Skywalker is now a triumphant soldier of the universe.