Electrons in a cathode ray tube have been emitted with a velocity of 1000 m s^-1. The number of following statements which is/are true about the…

Electrons in a cathode ray tube have been emitted with a velocity of $\displaystyle 1000 \mathrm{~m} \mathrm{~s}^{-1}$. The number of following statements which is/are true about the emitted radiation is $\displaystyle \_\_\_\_$.

Given : $\displaystyle \mathrm{h}=6 \times 10^{-34} \mathrm{~J} \mathrm{~s}, \mathrm{~m}_{\mathrm{e}}=9 \times 10^{-31} \mathrm{~kg}$.

The deBroglie wavelength of the electron emitted is $\displaystyle 666.67$ nm.

The characteristic of electrons emitted depend upon the material of the electrodes of the cathode ray tube.

The cathode rays start from cathode and move towards anode.

The nature of the emitted electrons depends on the nature of the gas present in cathode ray tube.