Electrons in a cathode ray tube have been emitted with a velocity of 1000   ms - 1 . The number of following statements which is/are true about the emitted radiation is Given : h = 6 × 10 - 34 Js , m e = 9 × 10 - 31   kg (A ) The deBroglie wavelength of the electron emitted is 666 . 67   nm (B ) The characteristic of electrons emitted depend upon the material of the electrodes of the cathode

Step-by-step solution

(A) V e = 1000   m / s ; h = 6 × 10 - 34 Js m e = 9 × 10 - 31   kg Debroglie wavelength: ⇒ λ = h mv = 6 × 10 - 34 9 × 10 - 31 × 1000 = 666 . 67 × 10 - 9   m = 666 . 67   nm (B) The characteristic of electrons emitted is independent of the material of the electrodes of the cathode ray tube. Electrons are fundamental to all traditional forms of matter. (C) The cathode rays start from cathode and move towards anode. It was discovered by Sir J.J. Thompson. (D