Physical World and Measurement

Size of our Galaxy = 10²¹ m Explanation

Distance of Sun from Earth = 10¹¹ m Explanation

Distance of moon from Earth = 10⁸ m Explanation

Thickness of Paper = 10⁻⁴ m Explanation

Wavelength of Light = 10⁻⁷ m Explanation

Length of Virus = 10⁻⁸ m Explanation

Size of Hydrogen Atom = 10⁻¹⁰ m Explanation

Size of Atomic Nucleus = 10⁻¹⁵ m Explanation

Size of Proton = 10⁻¹⁵ m Explanation