Question

which of the following has the longest wavelength
A) Infrared radiation
B) γ-radiation
C) Ultraviolet radiation
D) Visible radiation

Answer 1

Hey mate !!!

Question :-

Which of the following has the longest wavelength

Answer :-

A) Infrared radiation

Hope this helps ^_^

Answer 2

answer : option (A) infrared radiation.

explanation : we know, electromagnetic radiations are ; Radio wave , micro wave, infrared rays , visible rays , ultraviolet rays , x-rays , gamma rays and cosmic rays .

order of wavelength of electromagnetic radiations ; Radio wave > micro wave, infrared rays > visible rays > ultraviolet rays > x rays > gamma rays > cosmic rays

hence, radio wave has longest wavelength.

but in option only four radiations are given. e.g., Infrared radiation, γ-radiation

, Ultraviolet radiation and Visible radiation

in this radiations, infrared radiation has longest wavelength.

so, option (A) is correct choice.