Q. Arrange the following in the ascending order of wavelength $(\lambda)$ : (A) Microwaves $(\lambda_1)$ (B) Ultraviolet rays $(\lambda_2)$ (C) Infrared rays $(\lambda_3)$ (D) X-rays $(\lambda_4)$ Choose the most appropriate answer from the options given below :
A) $\lambda_4<\lambda_3<\lambda_2<\lambda_1$
B) $\lambda_3<\lambda_4<\lambda_2<\lambda_1$
C) $\lambda_4<\lambda_3<\lambda_1<\lambda_2$
D) $\lambda_4<\lambda_2<\lambda_3<\lambda_1$
Explanation
[Solution by Dr. Abubacker] In the electromagnetic spectrum wavelength increases in the order X-rays $<$ ultraviolet $<$ infrared $<$ microwaves, i.e. $\lambda_4<\lambda_2<\lambda_3<\lambda_1$. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.