Physics · 2021
JEE Main · 25 February 2021, Shift 2 · Q30
The wavelength of an X-ray beam is 10. The mass of a fictitious particle having the same energy as that of the X -ray photons is x/3 h kg. The value…
The wavelength of an X-ray beam is $\displaystyle 10 \AA$. The mass of a fictitious particle having the same energy as that of the X -ray photons is $\displaystyle \frac{x}{3} \mathrm{~h} \mathrm{~kg}$. The value of $\displaystyle x$ is \_\_\_\_. (h = Planck's constant)
Official answer
10
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.