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Edexcel | Physics WPH0 | S 17 4 1 | 1 hour 30 minutes
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1 Mark

A beam of electrons is produced to investigate the wave properties of particles.

The beam is obtained by accelerating the electrons across a potential difference.

   

Which of the following would decrease the wavelength associated with the electrons?

A  applying a smaller potential difference between the cathode and the anode

B  decreasing the momentum of the electrons

C  increasing the distance between the cathode and the anode

D  increasing the velocity of the electrons

D 

Incorrect Answers:

A – this would increase wavelength

B – this would increase wavelength

C – this would not affect wavelength

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