Q. A. The wavelength of microwaves is greater than that of UV-rays. B. The wavelength of IR rays is lesser than that of UV-rays. C. The wavelength of microwaves is lesser than that of IR-rays. D. Gamma rays have shortest wavelength in the Electromagnetic Spectrum. Of the above statements
A) A and B are true
B) B and C are true
C) C and D are true
D) A and D are true
Explanation
(d) The wavelength order of the given types of waves are given below
Waves Wavelength Range (in meter)
Gamma rays $10^{- 14} - 10^{- 10}$
IR-rays $7\ \times \ 10^{- 7} = 10^{- 3}$
UV-rays$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 10^{- 9} - 4 \times 10^{- 7}$
Microwave $10^{- 4}\ - 10^{0}$
Hence, statements (A) and (D) are correct.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.