Question

Calculate the de broglie wavelength of a mass 10 -10kg moving at a velocity 1000 cm/hr

Answer 1

here is ur answer..........................

Answer 2

The De Brogli wavelength is given by the formula :

⇒ λ =$\frac{h}{mv}$ , where h = Planck's constant (6.62 ×   $10^{-34}$Js)

                           m = Mass of electron (9.1 × $10^{31}$  Kg )

                            v = Velocity of the electron ( 2×$10^{6}$ $ms^{-1}$ )

Given that ,

• m= $10^{-10}$ kg

• v= 1000 cm/hr

          = $\frac{1000}{360000}$ m/sec ( converting cm/hr into m/sec )

          = 0.00277 m/sec

Now , inserting values in the equation ,

            λ =$\frac{h}{mv}$

             = $\frac{6.67 * 10^{-34} }{10^{-10} * 0.00277}$

              = $\frac{6.67 * 10^{-34} }{2.77*10^{-13} }$

Answer :   λ=2.4*$10^{21}$m