When an electron of H-atom jumps from a higher to lower energy state, then:
a) Its potential energy decreases
b) Its kinetic energy increases
c) Its angular momentum remains unchanged
d) Wavelength of de Broglie wave associated with the electron
As !!e^-!! moves from higher orbit:
As decreases !!E_n!!, kinetic energy increases.
Because !!K.E = -E_n !!
Similarly, !!P.E = 2E_n!!
Potential energy decreases.
Angular momentum !!(L)= (nh)/(2pi)=> L !! decreases as n decreases.
!!lambda_c = h/(mv_n)!!
Since K.E increases, !!v_n!! increases. Therefore, !!lambda_c!! decreases.
Therefore, option (a),(b) and (d) are correct.