Why is it impossible to obtain a visible interference pattern between two monochromatic light beams from different lamps?
- AThe frequency of the light from the two lamps can never be the same.
- BThe light from the two lamps can never be coherent.
- CThe temperature of the filaments of the two lamps used can never be the same.
- DThe wavelength of the light from the two lamps must always be different.