An electron passing through a potential difference of 4.9 V collides w – McqOptions

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1.	An electron passing through a potential difference of 4.9 V collides with a mercury atom and transfers it to the first excited state. What is the wavelength of a photon corresponding to the transition of the mercury atom to its normal state [AMU (Med.) 2002]
A.	2050 Å
B.	2240 Å
C.	2525 Å
D.	2935 Å
Answer» D. 2935 Å

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