Question 271: Dual Nature of Matter and Radiation

Question

Electron beam when accelerated by a voltage of 10 kV , has a de-Broglie wavelength ' $\lambda$ '. If the voltage is increased to 20 kV then the deBroglie wavelength associated with the electron beam would be

Accepted Answer

The de Broglie wavelength $\lambda=\frac{1.228}{\sqrt{\mathrm{v}}}(\mathrm{nm})$ If $\mathrm{v}=10 \mathrm{kV}$ then it is given that the de Broglie wavelength is $\lambda$.
If v is increased to 20 kV , then $\lambda$ will become $\frac{1}{\sqrt{2}}$ times.

Answer

$4 \lambda$

Answer

$2 \lambda$

Answer

$\frac{\lambda}{2}$

Answer

$\frac{\lambda}{\sqrt{2}}$

Dual Nature of Matter and Radiation

Electron beam when accelerated by a voltage of 10 kV , has a de-Broglie wavelength ' \lambda '. If the voltage is increased to 20 kV then the deBroglie wavelength associated with the electron beam would be

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