The device used for measuring the wavelength of X-rays is
(A) Microwave, Infrared, visible, X-rays
(B) X-rays, visible, infrared, microwave
(C) Visible, infrared, microwave, X-rays
(D) X-rays, infrared, visible, microwave
Correct Answer : X-rays, infrared, visible, microwave
Question Asked : SSC CAPFs SI & CISF ASI Exam 2013
Explanation : The Electromagnetic spectrum in order of decreasing energy, thus increasing wavelength : Gamma Rays– wavelength : 0.01 nm; X-rays–1 nm; Ultra-violet Rays- 0.1 micrometres, Violet Light : 0.4 micrometres; Infrared Radiations– 0.01 mm; Microwaves – less than 10 cm, usually 1 cm; Radiowaves- long, Medium and Short Waves : 2 km–10 m; and Very High Frequency (VHF) and Ultra High Frequency (UHF) : 10 m–10 cm.
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