An electromaghetic radiation has an energy 14 . 4 keV . To which region of the electromagnetic spectrum it…

An electromaghetic radiation has an energy 14.4keV. To which region of the electromagnetic spectrum it belongs
  1. Infrared
  2. Visible
  3. Ultraviolet
  4. X -ray

Solution

Recall the formula of energy,

E=hcλ=14.4×1000×1.6×10-19 J⇒hcλ=6.6×10-34×3×108λ=14.4×1000×1.6×10-19 J⇒λ=6.6×10-34×3×10814.4×1000×1.6×10-19 J=0.859×10-10 m⇒λ≈1 A∘ X-rays

Asked in: AP EAMCET 2018 (25 Apr Shift 1)

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