The sources which emit continous light waves of same wavelength//frequency and…………….or having…………are called………..sources.

Four sources emit sound waves of four different frequencies . Which one can not be heard?

Why can’t two independent monochromatic sources of light emitting light of one and the same wavelength behave as coherent sources?

Two sources of light are said to be coherent if the waves produced by them have the same

Two source of light emit X - rays of wavelenght 1 nm and visible light of wavelength 500 nm respectively . Both the source emit light of the same power 200 W. The ratio of the number density of photons of X - rays to the number density of photons of the visible light of the given wavelengths

Two source of light emit X - rays of wavelenght 1 nm and visible light of wavelength 500 nm respectively . Both the source emit light of the same power 200 W. The ratio of the number density of photons of X - rays to the number density of photons of the visible light of the given wavelengths