Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Two independent monochromatic light bulbs emitting light of the exact same wavelength can be used to produce a sustained interference pattern on a screen. Reason (R): The phase difference between the light waves emitted by two independent sources changes randomly and rapidly with time. In the light

Step-by-step solution

Assertion (A) is false. For a sustained interference pattern to be formed, the two sources of light must be coherent, meaning they must emit light waves with a constant phase difference. Two independent light bulbs, even if they emit light of the exact same wavelength, are incoherent sources and cannot produce a sustained interference pattern. Reason (R) is true. In independent light sources, light is emitted by millions of atoms undergoing transitions randomly. As a result, the phase of the emitted light changes a