Arrange the wavelengths of the following radiations in the decreasing order:

$λ_{\text{visible}}, λ_{\text{x-rays}}, λ_{\text{radiowaves}}, λ_{\text{γ-rays}}$

$λ_{\text{radiowaves}}>λ_{\text{visible}}>λ_{\text{x-rays}}>λ_{\text{γ-rays}}$

The correct answer is Option (4) → $λ_{\text{radiowaves}}>λ_{\text{visible}}>λ_{\text{x-rays}}>λ_{\text{γ-rays}}$

Wavelength and electromagnetic spectrum: The electromagnetic (EM) spectrum consists of different types of radiation arranged according to their wavelength or frequency.

General order of wavelengths (decreasing):

$\lambda_{\text{radiowaves}} > \lambda_{\text{visible}} > \lambda_{\text{x-rays}} > \lambda_{\gamma\text{-rays}}$

Correct order (decreasing wavelength):

$\lambda_{\text{radiowaves}} > \lambda_{\text{visible}} > \lambda_{\text{x-rays}} > \lambda_{\gamma\text{-rays}}$