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QAIPMT-2011-Ph-1913: NEET 2011 Physics - Class 12 AIPMT-2011-Ph-1913 Solution: Electrons used in an electron microscope are accelerated by a…
Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased to 100 kV then the de-Broglie wavelength associated with the electrons would
Multiple Choice Options
- A increase by 2 times
- B decrease by 2 times
- C decrease by 4 times
- D increase by 4 times
Step-by-Step Verified Solution
The de Broglie wavelength _ associated with the electrons is
_ = 1.227 V
where V is the accelerating potential in volts.
_ _ _ 1 V
_ _ 1 _ 2 = V 2 V 1
= 100 _ 10 3 25 _ 10 3 = 2
_ _ 2 = _ 1 2