Arrange the following waves in the increasing order of their wavelength.
(A) X-ray
(B) Gamma ray
(C) Infrared
(D) Ultraviolet
(E) Microwaves
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B), (A), (D), (C), (E)
All five are parts of the electromagnetic spectrum. The more energetic the wave, the shorter its wavelength, so the order runs from the most energetic to the least.
(B) Gamma rays — shortest, below about 10−11 m; given out by radioactive nuclei
(A) X-rays — about 10−11 m to 10−8 m
(D) Ultraviolet — about 10−8 m to 4 × 10−7 m, just shorter than visible violet light
(C) Infrared — about 7 × 10−7 m to 10−3 m, just longer than visible red light
(E) Microwaves — longest of the five, about 1 mm to 0.1 m