Chapter 39, Problem 39.89PP

To determine

The accelerating potential need to produce a helium ion with a wavelength of $\text{0}\text{.1}\text{pm}$ from the following options:

(a) Yes, the voltage required is $\text{21}\text{kV}$.

(b) Yes, the voltage required is $\text{42}\text{kV}$.

(c) No, a voltage higher than $\text{50}\text{kV}$ is required.

(d) No, a voltage lower than $\text{10}\text{kV}$ is required.