Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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# Cutoff Wavelength of X-rays Coming from a Coolidge Tube Depends on the - Physics

ConceptElectromagnetic Spectrum

#### Question

Cutoff wavelength of X-rays coming from a Coolidge tube depends on the
(a) target material
(b) accelerating voltage
(c) separation between the target and the filament
(d) temperature of the filament.

• target material

• accelerating voltage

• separation between the target and the filament

• temperature of the filament.

#### Solution

accelerating voltage

Cutoff wavelength (lambda_min)  is given by lambda_min = (hc)/(eV)

Here,
h = Planck's constant
c = Speed of light
V = Accelerating voltage
e = Charge of electron
Clearly, a cutoff wavelength depends on accelerating voltage. It does not depend on the target material, separation between the target and the temperature of the filament.

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Solution Cutoff Wavelength of X-rays Coming from a Coolidge Tube Depends on the Concept: Electromagnetic Spectrum.
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