Terms and Conditions
There is a law that lost information can be regained. For example, Every book contains information, but what will happen if we burn the book? When we collect the ashes, we get to know that the information is still there, but practically, it is impossible to read. After burning the book, only ashes will be remaining, and theoretically if we arrange the ash and smoke into the correct order, then we can regain the information and book (it doesn’t happen practically, but theoretically, it is possible).
But blackhole defies this law.
If the mass of blackhole is more, then the temperature of the blackhole will be less and vice versa. And because of this temperature, it always emits the radiation, which is known as a hawking’s radiation, and because of this radiation, the blackhole evaporates.
That means after the end of blackhole, no one can tell what the blackhole was made up of and what I have absorbed. This means, in this case, the information is lost and cannot be regained, which violates the law of nature, and it is called as blackhole information paradox.