I'm a disturbance, but nobody can see anything without me. What am I?

Answer: Light

More What am I ? with answers

More What am I ?

I’m a very valuable thing to have. Use me right now, you should. Yet if you cut off my hindquarters, I’d be but a piece of wood. What am I?
I’m always hungry and must be fed, the finger I touch will soon turn red, What am I?
I’m am everywhere and a part of everyone. I am at the end of space and time and existence itself. What am I?
I’m an old relative who’s hand’s can’t hold anything and eyes can’t see anything. What am I?
I’m Arabic, but if you speak English, you probably use me every day. What am I?
I’m as simple as a circle, worthless as a leader; but when I follow a group, their strength increases tenfold. By myself I’m practically nothing. What am I?
I'm colourful, You can have thick strips of me, And people often lose some of me. What am I?
I’m grown from darkness but shine with a pale light. Very round I am, and always a lady’s delight. What am I?
I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes. What am I?
I'm light as a feather, yet the strongest man can't hold me for much more than a minute. What am I?
I'm lighter than a feather, but the longer you hold me, the harder I am to keep. What am I?
I’m lighter than air but a million men can’t lift me. What am I?