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JEE Main 25 Feb 2021 Shift 2 Solved Paper

Section: Physics
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Question : 30 of 90
 
Marks: +1, -0
The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy as that of the X-ray photons is ‌
x
3
hkg. The value of x is ............
( h = Planck's constant)
[25 Feb 2021 Shift 2]
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