Two independent right sources cannot act as independent coherent sources .justify 

Asked by teerth17 | 14th Jul, 2015, 12:15: AM

Expert Answer:

The two independent light sources cannot act as coherent sources because light is emitted from individual atoms, when they return to the ground state after being excited by heat or electric discharge. Even the smallest source of light contains billions of such atoms which cannot emit light waves in same phase. Such independent sources of light waves do not possess a constant phase difference i.e. it continuously keeps on changing with time are called non-coherent sources or incoherent sources.
Two sources of light are said to be coherent, if they emit light waves of same frequency or wavelength and of a stable phase difference. 

Answered by Faiza Lambe | 14th Jul, 2015, 09:13: AM