The voltage applied to the Coolidge X-ray tube is increased by 25 % . As a result, the short wave limit of continuous X-ray spectrum shifts by Δ λ . The initial voltage applied to the tube is

Question

The voltage applied to the Coolidge X-ray tube is increased by 25 % . As a result, the short wave limit of continuous X-ray spectrum shifts by Δ λ . The initial voltage applied to the tube is, hc 4 eΔλ, hc 5 eΔλ, 4 hc 5 eΔλ, 5 hc 4 eΔλ

MARKS App · Accepted Answer

1 2 mv 2 max = eV = hc λ ⇒ λ = hc eV ⇒ λ 1 = hc eV 1 , λ 2 = hc eV 2 ⇒ λ 1 - λ 2 = hc eV 1 - hc eV 2 ⇒ Δλ = hc e 1 V 1 - 4 5 V 1 = hc eV 1 × 1 5 V = hc 5 ⋅ eΔλ

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