According to de Broglie's concept, the circumference of an orbit which must be equal to

Define de Broglie’s concept of matter waves.

de-Broglie concept of wave is related to :

According to De-Broglie, the waves are associated with

According to de Broglie's explanation of Bohr's second postulate of quantisation, the standing particle wave on a circular orbit for n = 4 is given by