Scientific notation || Standard Form Class 9th physics pashto Lecture

Standard form, also known as scientific notation or exponential notation, is a way of expressing numbers that are very large or very small in a compact and convenient format. In standard form, a number is written as the product of a coefficient (a number greater than or equal to 1 and less than 10) and a power of 10. For example: The speed of light in a vacuum is approximately \( 299,792,458 \) meters per second. In standard form, this is written as \( 2.99792458 \times 10^8 \) m/s. The mass of an electron is approximately \( 9.109 \times 10^{-31} \) kilograms. The distance from the Earth to the Sun is approximately \( 149.6 \) million kilometers, which can be expressed in standard form as \( 1.496 \times 10^8 \) kilometers. Standard form is particularly useful in scientific and mathematical contexts where dealing with very large or very small numbers is common. It simplifies calculations and makes it easier to compare and manipulate numbers across different scales.