A proton is accelerated to 225V. Its de-Broglie wavelength is: a. 1.91 pm
b. 0.2 pm
c. 3 pm
d. 0.4 pm

The  value  is  

Explanation:

From the question we are told that

  The  potential of the proton is  

Generally the momentum of the particle is mathematically represented as

Here  e is the charge on the proton with value  

      m is the mass of the proton with value  

So

=>    

So the de-Broglie wavelength isis mathematically represented as

Here  h is the Planck's  constant with value  

=>  

=>

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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