Q. The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays is
A) Infrared, microwave, ultraviolet, gamma rays
B) Microwave, infrared, ultraviolet, gamma rays
C) Gamma rays, ultraviolet, infrared, microwaves
D) Microwaves, gamma rays, infrared, ultraviolet
Explanation
[Solution from source] In the EM spectrum wavelength falls from microwaves (mm–cm) to infrared (μm) to ultraviolet (~100 nm) to gamma rays (< 0.01 nm). The order starting with gamma rays is increasing, not decreasing, wavelength. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.