Question

According to Big Bang Theory the age of the universe is:
1. 13·8 × 10⁶ years
2. 13·8 × 10⁷ years
3. 13·8 × 10⁸ years
4. 13·8 × 10⁹ years

Answer 1

Correct Answer - Option 4 : 13·8 × 10⁹ years

The correct answer is option 4) i.e. 13·8 × 109 years

CONCEPT:

• Big bang theory: The big bang theory explains the existence of the universe as it was created from a massive explosion that took place bringing and creating matter we have today.
  • This creation of matter is the start of the universe and scientists use the occurrence of this as a reference to the age of the universe.
  • From a number of studies, it is approximated that the Big bang occurred 13.8 billion years ago, as of today.

EXPLANATION:

• The age of the universe is calculated with reference to the occurrence of the Big Bang i.e. 13.8 billion years ago.
• 1 billion = 10⁹ 

Therefore, the age of the universe is 13·8 x109 years.