Electromagnetic Wave Speeds · PhysicsBowl 2010 #19

Physics · electromagnetism

Problem

Which is the correct relationship for the speed (v) of the following three electromagnetic waves in vacuum? The waves are: X-rays, UV rays, microwaves. (A)

v_{\text{X-ray}} < v_{\text{microwaves}} < v_{\text{UV rays}}

(B)

v_{\text{microwaves}} < v_{\text{UV rays}} < v_{\text{X-ray}}

(C)

v_{\text{X-ray}} = v_{\text{microwaves}} = v_{\text{UV rays}}

(D)

v_{\text{UV rays}} < v_{\text{microwaves}} < v_{\text{X-ray}}

(E)

v_{\text{X-ray}} < v_{\text{UV rays}} < v_{\text{microwaves}}

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