Can the head lights of a distant car produce interference pattern? If so, how it is observed? If not, why?

Two coherent light beams of intensities I and 4I produce interference pattern. The intensity at a point where the phase difference is zero, will b:

(a) Define a wavefront. Use Huygen' principle to shown diagrammatically the propagation of a plane wavefront from the intant t_(1)=0 to later time t_(2) . (b) State briefly two features which can distinguish the characteristic features of an interference pattern from those observed in the diffraction pattern due a single slit.

Assertion : The fringe closest on either side of the central white fringe in case of interference pattern due to white light is red and the farthest appears blue. Reason : The interference patterns due to different component colours of white light overlap.

Explain why two flashlights held close together do not produce an interference pattern on a distant screen?

Two incoherent sources of light each with equal intensity I_(0) interfere in a medium . Will any interference pattern be observed ? If no, then why ? Also what would be resultant intensity then ?

In Young's double slit experiment, if the two slits are illuminated with separate sources, no interference pattern is observed because

Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern where bright fringes are separated by 8.1 mm . Another light produces the interference pattern, where the bright fringes are separated by 7.2 mm . Calculate the wavelength of second light.

Laser light of wave length 600 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 8mm. A second light produces an interference pattern in which the fringes are separated by 12 mm. Calculate the wavelength of the second light.

In a double slit interference pattern, the first maxima for infrared light would be

The two slits in Young's double slit experiment are illuminated by two different sodium lamps emitting light of the same wavelength. No interference pattern will be observed on the screen.