Physics - Modern Physics Question with Solution | TestHub

An electron accelerated through a potential difference ' $V_1$ ' has a de-Broglie wavelength ' $\lambda$ '. When the potential is changed to ' ${\mathrm{V}}_2$ ' its de-Broglie wavelength increases by $50\%$. The value of $\left(\frac{{\mathrm{V}}_1}{{\mathrm{V}}_2}\right)$ is