Find the ratio of de-Broglie wavelengths associated with two electrons A and B which are accelerated 8V and 64 Volts respectively.

Explanation

To find the ratio of de-Broglie wavelengths associated with two electrons A and B which are accelerated through 8V and 64V respectively, we can follow these steps:

### Step 1: Write the formula for de-Broglie wavelength
The de-Broglie wavelength (\( \lambda \)) of an electron can be expressed using the formula:
\[ \lambda = \frac{h}{\sqrt{2m_e e V}} \]
where:
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