Davisson and Germer performed their experiment with a nickel target for several electron bombarding energies. At what angles would they find diffraction maxima for 38 eV and 54 eV electrons?

The angle of diffraction are 67.75 deg and 53.57 deg.

Explanation:

Given:

Davisson and Germer  experiment with nickel target for electrons bombarding.

Voltages : and

We have to find the angles that is   and .

Concept:

Solution:

Finding the wavelength at .

⇒

⇒ nm

    Plugging the values of wavelength.

⇒  

⇒  

⇒ degrees.

Now

For for the electrons with energy , the wavelength is.

⇒ nm

And

⇒ degrees.

So,

The angles of diffraction maxima are 67.75 deg and 53.57 deg.

the correct choice is a .

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